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Schmuller, J. (2017). Statistical analysis with R for dummies. O'Reilly Media, Inc.
Read Chapter 10: One-sample Hypothesis Testing
This chapter discusses how to estimate the strength of an association between groups and demonstrates how to run and plot the Chi-Square test and distribution in R.
Read Chapter 15: Correlation: The Rise and Fall of Relationships
This chapter explains what corrlation is used for, how to implement a correlational analysis in R, and how to interpret the results.