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We have included separate introductory **tutorials** for basic **R** concepts. The topics are by no means comprehensive. Nevertheless, even if you are not familiar with **R**, you can go through just the first **R** Introduction page. Then go straight to the **statistics** **tutorials**, and only come back for reference as needed. Please find the topics you are. The R Project for Statistical Computing Getting Started. R is a free software environment for statistical computing and graphics. It compiles and runs on a wide variety of UNIX platforms, Windows and MacOS. To download R, please choose your preferred CRAN mirror Welcome to r-statistics.co. An educational resource for those seeking knowledge related to machine learning and statistical computing in R. Here, you will find quality articles, with working R code and examples, where, the goal is to make the #rstats concepts clear and as simple as possible.. This is built by keeping in mind, statisticians who are new to R programming language, R programmers. R Tutorial Obtaining R. R is available for Linux, MacOS, and Windows. Software can be downloaded from The Comprehensive R Archive Network (CRAN). Startup . After R is downloaded and installed, simply find and launch R from your Applications folder. Entering Commands. R is a command line driven program. The user enters commands at the prompt (> by default) and each command is executed one at a.

This tutorial is designed for software programmers, statisticians and data miners who are looking forward for developing statistical software using R programming. If you are trying to understand the R programming language as a beginner, this tutorial will give you enough understanding on almost all the concepts of the language from where you can take yourself to higher levels of expertise Einfuhrung in die Statistik-Programmier-Sprache R¨ M¨uller, SS 2005 1 Grundlagen von R Die Statistik-Software R ist eine objekt-orientierte, interaktive Programmiersprache, mit der einfach statistische Auswertungen vorgenommen, vielf¨altige Graﬁken erstellt und Simulationen durchgefuhrt werden k¨ ¨onnen. Sie kann umsonst vom Internet. R programming for beginners - statistic with R (t-test and linear regression) and dplyr and ggplot - Duration: 15:49. Global Health with Greg Martin 766,284 views 15:4 R Statistik Tutorial. Hier finden Sie interessante Artikel und Anleitungen zu grundlegenden Themen der Statistik mit R, die Sie zum Selbststudium nutzen können. Die Artikel konzentrieren sich auf die Umsetzung statistischer Verfahren und. diskutieren zusätzlich die Interpretation der Outputs und die Prüfung von Voraussetzungen. Streudiagramm und einfache lineare Regression mit R. Mit.

Import Data, Copy Data from Excel to R CSV & TXT Files | R Tutorial 1.5 | MarinStatsLectures - Duration: 6:59. MarinStatsLectures-R Programming & Statistics 718,754 views 6:5 ## Mathematik IV: Statistik -- R tutorial ## Author: Hans Muster ## Date: 15 March 2012 ## getting started z <- c(8,13,21) 2*z ## computing with vectors fib <- c(1,1,2,3,5,z) # vector with first 8 Fibonacci numbers fib 2*fib + 1 # element-wise operations fib*fib # element-wise multiplication log(fib) # takes the log of each element s <- 2*(1:3) # vector holding 2, 4, 6 s1 <- seq(2,6,by=2. Einführung in R Marlene Müller Folienversion: 13. April 2012 20 30 40 50 60 70 0 5000 10000 15000 age amount Amount amount Density 0 5000 10000 15000 2000 Dieses Tutorial beﬁndet sich, genau so wie R in ständiger Weiterentwicklung. Im Regelfall erscheint jedes Jahr mindestens ein Update und es sollte immer die aktuellste Version heruntergeladen werden. Aus diesem Grund ist es hiermit auch ausdrücklich verboten zusätzliche Kopien des Tutorials ins Internet zu stellen. Das Ausdrucken, Kopieren und Weitergeben an gute Freunde (auf USB-Stick. The Department of Statistics offers two 1 credit online courses, STAT 484: Topics in R: Statistical Language and STAT 485 - Intermediate Topics in R Statistical Language. This would be a good step towards building a solid foundation in using R. In addition, you may also find the following references handy: The R Project Homepage

* R-squared measures the proportion of the variation in your dependent variable (Y) explained by your independent variables (X) for a linear regression model*. Adjusted R-squared adjusts the statistic based on the number of independent variables in the model.${R^2}$ shows how well terms (data points) fit a curve or line. Adjusted ${R^2}$ also indicates how well terms fit a curve or line, but. This introduction to R is derived from an original set of notes describing the S and S-Plus environments written in 1990-2 by Bill Venables and David M. Smith when at the University of Adelaide. We have made a number of small changes to reflect differences between the R and S programs, and expanded some of the material. We would like to extend warm thanks to Bill Venables (and David Smith. ist die Lekture der beiden Tutorials¨ An Intruduction to R sowie R Data Import/Export) und den Link zum Webauftritt von R. Mike Kuhne¨ 5 Einfuhrung in R¨ 5 EINE BEISPIELSITZUNG 5 Eine Beispielsitzung 5.1 Konventionen im Skript Um die Lesbarkeit des Skriptes zu erh¨ohen, werden einige Konventionen zur Darstellung bestimmter Sachverhalte getroﬀen. input Eingabe von Code: Zeile beginnt mit. simpleR { Using R for Introductory Statistics John Verzani 20000 40000 60000 80000 120000 160000 2e+05 4e+05 6e+05 8e+05 y. page i Preface These notes are an introduction to using the statistical software package Rfor an introductory statistics course. They are meant to accompany an introductory statistics book such as Kitchens \Exploring Statistics. The goals are not to show all the features.

- The R Project for Statistical Computing. Die offizielle Homepage des R-Projektes. R by example: Eine interessante Sammlung von R-Beispielen . R Tutorial: Ein R-Toturial der Clarkson Universität, Potsdam, NY . LibreOffice Das kostenfreie Office-Programm, das keine Wünsche offen lässt! Hat der Inhalt Ihnen weitergeholfen und Sie möchten diese Seiten unterstützen? Impressum Datenschutz.
- The Complete ggplot2 Tutorial - Part1 | Introduction To ggplot2 (Full R code) Previously we saw a brief tutorial of making charts with ggplot2 package. It quickly touched upon the various aspects of making ggplot. Now, this is a complete and full fledged tutorial. I start from scratch and discuss how to construct and customize almost any ggplot.
- Statistics / Analytics Tutorials The following is a list of tutorials which are ideal for both beginners and advanced analytics professionals. It's a step by step guide to learn statistics with popular statistical tools such as SAS, R and Python. It would give you an idea how these algorithms works in background and how to perform these.
- RStudio is an active member of the R community. We believe free and open source data analysis software is a foundation for innovative and important work in science, education, and industry. The many customers who value our professional software capabilities help us contribute to this community. Visit our.
- Benötigen Sie Hilfe bei der Erstellung von Matrizen in R oder Beratung zum Thema Rechnen mit Matrizen in R? Nehmen Sie Kontakt zu uns auf und Schildern uns Ihr Anliegen! Hier geht es zurück zur R-Statistik-Tutorial-Übersicht. Zurück zur Startseite finden Sie hier: Beratung Datenanalyse
- g language is widely used by data scientists and major corporations like Google, Airbnb, Facebook etc. for data analysis. This is a complete course on R for beginners and covers basics to advance topics like machine learning algorithm, linear regression, time series, statistical inference etc

In this tutorial, I 'll design a basic data analysis program in R using R Studio by utilizing the features of R Studio to create some visual representation of that data. Following steps will be performed to achieve our goal. Downloading/importing data in R ; Transforming Data / Running queries on data; Basic data analysis using statistical average RStudio is a set of integrated tools designed to help you be more productive with R. It includes a console, syntax-highlighting editor that supports direct code execution, and a variety of robust tools for plotting, viewing history, debugging and managing your workspace R Statistics and Software Tutorial. R is a programming language and software provider for statistical computing and graphical visualization. It has many features which has in-built functions as well as functional coding. Both the ways it can be done in R. R is a freely available under GNU general public License. R provides a wide variety of statistics and graphical techniques which includes. Statistics and Probability: Statistics and Probability are the building blocks of the most revolutionary technologies in today's world. From Artificial Intelligence to Machine Learning and Computer Vision, Statistics and Probability form the basic foundation to all such technologies. In this article on Statistics and Probability, I intend to help you understand the math behind the most.

** A Handbook of Statistical Analyses Using R Brian S**. Everitt and Torsten Hothorn. Preface This book is intended as a guide to data analysis with the R system for sta- tistical computing. R is an environment incorporating an implementation of the S programming language, which is powerful, ﬂexible and has excellent graphical facilities (R Development Core Team, 2005). In the Handbook we aim to. R ist eine freie Programmiersprache für statistische Berechnungen und Grafiken. Sie wurde 1992 von Statistikern für Anwender mit statistischen Aufgaben neu entwickelt. Die Syntax orientiert sich an der Programmiersprache S, mit der R weitgehend kompatibel ist, und die Semantik an Scheme.Als Standarddistribution wird R mit einem Interpreter als Kommandozeilenumgebung mit rudimentären. Learn R by doing 62 interactive coding exercises. Start now

- Computational Statistics Using R and R Studio An Introduction for Scientists Randall Pruim SC 11 Education Program (November, 2011
- Learn Data Science from the comfort of your browser, at your own pace with DataCamp's video tutorials & coding challenges on R, Python, Statistics & more
- Yakir, The Hebrew University June, 2011. 2. In memory of my father, Moshe Yakir, and the family he lost. ii. Preface The target audience for this book is college students who are required to learn statistics, students with little background in mathematics and often no motiva-tion to learn more. It is assumed that the.
- g. Yes! R is the ultimate solution to every statistics problem and DataFlair is the way to master R program
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R is the language of big data—a statistical programming language that helps describe, mine, and test relationships between large amounts of data. Author Barton Poulson shows how to use R to model statistical relationships using graphs, calculations, tests, and other analysis tools. Learn how to enter and modify data; create charts, scatter plots, and histograms; examine outliers; calculate. * Descriptive Statistics *. R provides a wide range of functions for obtaining summary statistics. One method of obtaining descriptive statistics is to use the sapply( ) function with a specified summary statistic. # get means for variables in data frame mydat

These R statistics tutorials briefly explain the use and interpretation of standard statistical analysis techniques for Medical, Pharmaceutical, Clinical Trials, Marketing or Scientific Research. The examples include how-to instructions for R Software. Although there are millions of R users around the world, there is a substantial learning curve involved in mastering the program.These. A Tutorial on Loops in R - Usage and Alternatives Discover alternatives using R's vectorization feature. This R tutorial on loops will look into the constructs available in R for looping, when the constructs should be used, and how to make use of alternatives, such as R's vectorization feature, to perform your looping tasks more efficiently 39 thoughts on A step by step (screenshots) tutorial for upgrading R on Windows Pingback: R 3.2.1 is released | R-statistics blog. Pingback: R 3.2.2 is released | R-statistics blog. charlescara says: March 15, 2016 at 10:10 am . Thank you. This package is a great help. Reply. PMM van Haard, Ph.D. says: March 15, 2016 at 3:24 pm . In my experience: In Windows 10 the packages copied from.

- Welcome to Applied Statistics with R! 1.1 About This Book This book was originally (and currently) designed for use with STAT 420, Meth-ods of Applied Statistics, at the University of Illinois at Urbana-Champaign. It may certainly be used elsewhere, but any references to this course in this book specifically refer to STAT 420
- R- Stutorials bietet eine deutschsprachige Einführung in R mit der Benutzeroberfläche RStudio. Videos auf Youtube. Youtub
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- Another free online interactive learning tutorial for R is available by O'reilly's code school website called try R. Statistics in R - The R Language for Statistical Analysis (3 Hours of video) Machine Learning and Statistical Modeling with R Examples (3 Hours of video) Introduction To Data Science (6 Hours of video) Statistics.com. Statistics.com is an online learning website with.
- LearningstatisticswithR: Atutorialforpsychologystudentsandotherbeginners (Version0.4) DanielNavarro UniversityofAdelaide daniel.navarro@adelaide.edu.a

- The R Project for Statistical Computing ist eine Entwicklungs- und Laufzeitumgebung für die Programmiersprache R, die statistischen und numerischen Berechnungen sowie deren grafischer Darstellung.
- III. Graphiken in R Eine Einführung in R: Deskriptive Statistiken und Graphiken Bernd Klaus, Verena Zuber Institut für Medizinische Informatik, Statistik und Epidemiologie (IMISE), Universität Leipzig 28. Oktober 2010 Bernd Klaus, Verena Zuber Deskriptive Statistiken und Graphiken 1/2
- g mathematical computations on it
- g language to help getting familiar with R and start using R for data analysis. The videos cover topics like descriptive statistics with R, Probability Distribution with R, Bivariate Analysis with R, and Linear Regression with R
- This tutorial will look at the open source statistical software package R. Stu-dents that are not familiar with command line operations may feel intimidated by the way a user interacts with R, but this tutorial series should alleviate these feelings and help lessen the learning curve of this software. Why should I use R for my work? R has many.

R Statistics Guide. Learn to use R for statistical analysis . Main Navigation. Menu. Home; About; Start Here; Contact Us; R Statistics A guide for beginners If you are interested in learning how to use R for statistical analysis, you've come to the right place. Start Here Learn R. Use the content on this site to begin your journey learning how to use R. On this site you will find: R tutorials. I highly recommend Visualize This by Nathan Yau. Both this book and the author's blog, FlowingData contains lots of tutorials about using R in order to do some good statistics. Check a look at the.

R is hot. Whether measured by more than 10,000 add-on packages, the 95,000+ members of LinkedIn's R group or the more than 400 R Meetup groups currently in existence, there can be little doubt. * With this RStudio tutorial, learn about basic data analysis to import, access, transform and plot data with the help of RStudio*. It is an open-source integrated development environment that facilitates statistical modeling as well as graphical capabilities for R These tutorials cover various data mining, machine learning and statistical techniques with R. It explains how to perform descriptive and inferential statistics, linear and logistic regression, time series, variable selection and dimensionality reduction, classification, market basket analysis, random forest, ensemble technique, clustering and more Learn Statistics with R from Duke University. In this Specialization, you will learn to analyze and visualize data in R and create reproducible data analysis reports, demonstrate a conceptual understanding of the unified nature of statistical.

r statistics free download - R Project, PASW Statistics, R Studio Data Recovery Software, and many more program This tutorial will teach you anything you need to know about descriptive and inferential statistics as well as regression modeling in R. While planing this course we were focusing on the most important inferential tests that cover the most common statistical questions This tutorial will explore the ways in which R can be used to calculate summary statistics, including the mean, standard deviation, range, and percentiles. Also introduced is the summary function, which is one of the most useful tools in the R set of commands. Tutorial File Follow the step by step procedure and download R and RStudio in an easy way. Check out the installation process of R and RStudio on Linux operating systems, Microsoft Windows, and Mac OS X and also look at some useful R packages that enhance R's capabilities. How to Install R. In this tutorial, you will learn to-Install R and RStudio on Linu

- Author Tal Galili Posted on August 16, 2010 Categories R, R bloggers Tags deducer, ggplot2, google summer of code, GUI, Hadley Wickham, Ian fellows, interfaces, plot builder, R, R GUI, SPSS, statistics, tutorial, tutorials, videos, visualization, youtube 9 Comments on ggplot2 plot builder is now on CRAN! (through Deducer 0.4 GUI for R
- g language and free software environment for statistical computing and graphics supported by the R Foundation for Statistical Computing. The R language is widely used among statisticians and data
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- Bootstrapping in R - A Tutorial Eric B. Putman Department of Ecosystem Science and Management . Bootstrapping •Resampling technique with replacement -The population is to the sample as the sample is to the bootstrap samples •Allows estimation of the sampling distribution of a statistic -Confidence intervals, bias, variance, etc. Procedure •Resample a dataset a given number of.
- In this tutorial we'll analyze the effect of going to Catholic school, as opposed to public school, on student achievement. Because students who attend Catholic school on average are different from students who attend public school, we will use propensity score matching to get more credible causal estimates of Catholic schooling
- You can find a list of R packages for analysing clinical trial data on the CRAN Clinical Trials Task View. To learn about biomedical statistics, I would highly recommend the book Medical statistics (product code M249/01) by the Open University, available from the Open University Shop
- g R - This one isn't a downloadable PDF, its a collection of wiki pages focused on R. The book assumes some knowledge of statistics and is focused more on program

Fox, John (2002) An R and S-Plus Companion to Applied Regression; Venables, William N. / Ripley, Brian D. (2002): Modern applied statistics with S; Dubravko Dolic (2003): Statistik mit R. Einführung für Wirtschafts- und Sozialwissenschaftler, Oldenbourg, ISBN 3486275372; Behr, Andreas (2005): Einführung in die Statistik mit R. ISBN 380063219 Für viele Studierende ist die an sich spannende Statistik leider ein Buch mit sieben Siegeln. Hier im Wissenschafts-Thurm soll daher in den nächsten Jahren ein Archiv mit möglichst leicht verständlichen statistischen Lehrmaterialien bestehend aus erklärenden Artikeln, Übungsaufgaben, Musterlösungen und Tipps entstehen R Programming for Statistics and Data Science 2020. R Programming is a skill you need if you want to work as a data analyst or a data scientist in your industry of choice. And why wouldn't you? Data scientist is the hottest ranked profession in the US. But to do that, you need the tools and the skill set to handle data. R is one of the top languages to get you where you want to be. Combine. Top 100 R Tutorials : Step by Step Guide In this R tutorial, you will learn R programming from basic to advance. This tutorial is ideal for both beginners and advanced programmers. R is the world's most widely used programming language for statistical analysis, predictive modeling and data science. It's popularity is claimed in many recent surveys and studies. R programming language is getting. Get the tutorial PDF and code, or download on GithHub.A more recent tutorial covering network basics with R and igraph is available here.. If you find the materials useful, please cite them in your work - this helps me make the case that open publishing of digital materials like this is a meaningful academic contribution: Ognyanova, K. (2016) Network analysis with R and igraph: NetSci X.

Statistics Tutorials. If you're struggling with statistics, you don't have to go it alone. These tutorials and other resources will take you step-by-step through examples at every skill level R is a powerful language used widely for data analysis and statistical computing. It was developed in early 90s. Since then, endless efforts have been made to improve R's user interface. The journey of R language from a rudimentary text editor to interactive R Studio and more recently Jupyter Notebooks has engaged many data science communities across the world. This was possible only because. Wenn Sie noch R-Neuling sind, hilft Ihnen sicher das Buch Einführung in R beim Einstieg in R weiter. Ohne Voraussetzungen werden Sie in die R-Entwicklungsumgebung eingeführt.Sie werden in der Lage sein, R für Ihre Fragestellungen anzuwenden, zu erweitern und; eigene Funktionen zu schreiben. Die im Buch aufgeführten Beispiele finden Sie auf der Seite Buchbeispiele

R converts the numbers to '1' and '2' instead of '0' and '1'. This has to do with how R stores factor levels internally. If you want to convert a factor variable to numeric, always remember to convert factors using as.numeric(as.character(var)) where var is your variable of interest Statistical Analyses. Data Analysis Examples; Textbook Examples (see also Stat Books for Loan on R) Downloadable Books on R; Important Links. How can I get R? Where can I run R? Installing, Customizing, Updating R; Documentation for R packages organized by topical domains; Have you seen? Class Notes: Introduction to R Learning Statistics with R by Danielle Navarro . Back in the grimdark pre-Snapchat era of humanity (i.e. early 2011), I started teaching an introductory statistics class for psychology students offered at the University of Adelaide, using the R statistical package as the primary tool. I wrote my own lecture notes for the class, which have now expanded to the point of effectively being a book.

Statistical analysis. Association analysis; Bimodality; Community comparisons (limma, PERMANOVA, mixed models, negative binomial etc) Tutorial workflows. Analysis of gut microbiota in 1006 western adults; Univariate tests for two-group comparison; Development. New examples, tutorial pages, and other contributions are welcome. The material can be freely used, modified and distributed under the. stats Package in R | Tutorial & Programming Examples . The stats R package provides tools for statistical calculations and the generation of random numbers.. Here you can find the CRAN page of the stats package.; Tutorials on the stats Package. You can find tutorials and examples for the stats package below

Online. On-demand. Intro to the programming in R, focused on tidyvers Statistical languages like R are no exception of that rule. Many of my students think the same and would love to see more exercises. Therefore, I decided to write an R exercise sheet for beginners and blog it over here. These R exercises are an . Continue Reading Microsoft Excel 2016 - The Comprehensive Excel 2016 Guide. R Tutorials; 18 Sep, 2015; Excel, Udemy; excel, excel 2016.

Descriptive Statistics in R Part 1 Calculating mean, standard deviation and other descriptive statistics (This tutorial uses the raw data file CARSMPG.CSV. Download this file here. The program assumes the data file is in the folder C:\RDATA. Make changes to the R program if you save the file to a different folder.) See also Import Data into R from Excel The following code creates an object. Unlike many statistical packages, R does not usually display the results of analyses you perform. Instead, analyses usually end up by producing an object which can be stored. Results can then be obtained from the object at leisure. For this reason, when doing statistics in R, you will often find yourself naming and storing objects. The name you choose should consist of letters, numbers, and. [x-post r/statistics] Slack reading group for McElreath's Statistical Rethinking Hi all, Now that the 2nd edition of McElreath's wonderful Bayesian statistics book Statistical Rethinking is out, I just wanted to invite everyone interested in reading it, talking about it, and asking each other questions about it to the Statistical Rethinking Study Group slack Tutorial zur Deskriptiven Statistik Tutorial zu SPSS und R - Installation und Nutzung (Flash-Animation) In diesem Tutorial soll beispielhaft gezeigt werden, wie die SPSS-Erweiterung zur Programmiersprache R installiert und genutzt wird. Der Zugang zu neuen statistischen Verfahren und, als Teilbereich, neuen grafischen Visualisierungsmöglichkeiten von Ergebnissen statistischer Verfahren. R Programming: Advanced Analytics In R For Data Science by Kirill Eremenko will take your R & R studio skills to the next level. You require basic knowledge of R before taking this advanced R tutorial. This R programming language projects will learn data analytics, data science, statistical analysis in business, ggplot2, etc. You will learn how to perform data preparation in R. This R.

R ANOVA Tutorial: One way & Two way (with Examples) Details Last Updated: 06 April 2020 . What is ANOVA? Analysis of Variance (ANOVA) is a statistical technique, commonly used to studying differences between two or more group means. ANOVA test is centred on the different sources of variation in a typical variable. ANOVA in R primarily provides evidence of the existence of the mean equality. Tutorial Video Abstract In this webinar you will learn. how to import data from Microsoft Excel into R; how to use R to perform statistical analyses; how get a beautifully formatted figure from your data . Summary: This webinar will take the case study approach to introduce R to biologists with little or no previous knowledge of the program R contains a built-in function named summary to calculate basic statistics of a dataset. We are passing the input data to this function, converting the output to a data frame using the data.frame function and assigning the result to the output stream using the default output name i.e. OutputDataSet Edit the Targetfield on the Shortcuttab to read C:\Program Files\R\R‐2.5.1\bin\Rgui.exe ‐‐sdi(including the quotes exactly as shown, and assuming that you've installed R to the default location). Then edit the shortcut name on the Generaltab to read something like R 2.5.1 SDI An R Tutorial 1. Starting Out R is an interactive environment for statistical computing and graphics. This tutorial will assume usage of R 2.0.0 on a PC. However, except in rare situations, these com- mands will work in R on UNIX and Macintosh machines as well as in S-Plus on any platform. R can be freely downloaded at http:\\r-project.org\. Before reviewing R commands, it is important for you.

GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. Sign up. a curated list of R tutorials for Data Science, NLP and Machine Learning datascience data-science r text-mining 161 commits 1 branch 0 packages 0 releases Fetching contributors MIT R Rebol. R 99.9%; Rebol 0.1%; Branch: master. New pull request Find file. R Fundamentals and Programming Techniques Thomas Lumley R Core Development Team and UW Dept of Biostatistics Birmingham — 2006-2-27/28. What are R and S-PLUS? • R is a free implementation of a dialect of the S language, the statistics and graphics environment for which John Chambers won the ACM Software Systems award. S was consciously designed to blur the distinction between users and.

Hier finden Sie die Daten und Scripte für die Übungsaufgaben und die Videotutorials. Daten und Scripte zum Buch Explorative und Deskriptive Datenanalyse mit R finden Sie hier.. contrast_im.R und contrast_dm.R beötigen die R Version 3.2.0 oder höhe In this tutorial we will learn how to interpret another very important measure called F-Statistic which is thrown out to us in the summary of regression model by R. We have already seen R Tutorial : Multiple Linear Regression and then we saw as next step R Tutorial : Residual Analysis for Regression and R Tutorial : How to us What is Descriptive **Statistics**. The purpose of descriptive **statistics** is to present a mass of data in a more understandable form. We may summarize the data in numbers as (a) some form of average, or in some cases a proportion, (b) some measure of variability or spread, and (c) quantities such as quartiles or percentiles, which divide the data so that certain percentages of the data are above. Appropriate for those with basic knowledge of R; This is not a statistics course! Learning objectives: Learn the R formula interface ; Specify factor contrasts to test specific hypotheses; Perform model comparisons; Run and interpret variety of regression models in R; Materials and Setup. Lab computer users: Log in using the user name and password on the board to your left. Laptop users: you.