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EASY-R
Step-by-step instructions on how to use the free statistics program R for absolute beginners, by Biologists Lindsey Gray and Brittany Mitchell.
Download R: https://cran.r-project.org
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1. Quick statistics re-hash before going into R-specific stuff
Hi! Here are some instructions for running some basic parametric statistical analyses in R. Make sure you use an independent information...
2. R specific words and definitions you need to learn
R object R makes “objects”. Each time you run an analysis in R or import data into R it makes a new object. If you have imported data...
3. Downloading R and R packages
Downloading R and R packages R is a free statistical analysis program you can download from the internet. You can Google “CRAN R Project”...
4. Preparing data and getting data into R using the Bill length and Egg width practice datasets
Preparing and Getting data into R You need to have your data saved in a text file that has no errors in it. If there are even little...
5. Two sample t-tests in R with bill length data-set
Two sample t-test (also called Student’s two-sample t-test) You use a t-test when you compare the values of a continuous variable between...
6. One sample t-test with chick weight data set
One sample t-test A one-sample t-test can be used when you have a “standard” value or an a priori value you want to compare your own data...
7. ANOVA in R with post-hoc pairwise t-tests using egg width dataset
Analysis of Variance (ANOVA) This test is similar to a t-test in that a statistical comparison of the values of a continuous variable is...
8. Regression in R using the growth dataset
Regression Regressionis the analysis you use when your independent or predictor variable is continuous/scale (“vector”) and your...
9. Correlation analysis in R using the 'grow' dataframe from the growth dataset
Correlation You use correlation analysis to see if there is a significant relationship between two continuous variables. For example...
10. Chi-square analysis in R using "below25%line" dataset
Chi-square Chi-square is the test I use the least. Even though it is one of the more simple tests, I always get a little confused about...
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