Mack's Stats

A researcher is interested in the effects of drug against stress reaction. She gives a reaction time test to three different groups of subjects: one group that is under a great deal of stress, one group under a moderate amount of stress, and a third group that is under almost no stress. The subjects of the study were instructed to take the drug test during their next stress episode and to report their stress on a scale of 1 to 10 (10 being most pain).

1. Report on drug and stress level by using R. Provide a full summary report on the result of ANOVA testing and what does it mean. More specifically, report  using the following R functions: Df, Sum, Sq Mean, Sq, F value, Pr(>F)

  
2. From our Textbook:Introductory Statistics with R. Chapter # 6 Exercises 6.1 pp. 127 plus.
The zelazo data (taken from textbook’s R package called ISwR) are in the form of a list of vectors, one for each of the four groups. Convert the data to a form suitable for the user of lm, and calculate the relevant test. Consider t tests comparing selected subgroups or obtained by combining groups.    

2.1  Consider ANOVA test (one way or two-way) to this dataset (zelazo)