Let's perform all the steps for checking distribution for different diets.

1. High fat diet

1.1 Build a histogram and QQ plot of body weights for the "hf" diet. Put the plots in one row, two
columns for a better view.

1.2 Perform three normality tests.

1.3 Transform the data, build two histograms in one row, two columns to compare (before and after
transformation).

1.4 Build two QQ plots in one row, two columns to compare (before and after transformation).

1.5 Perform the normality tests again but on the transformed data.

What can you conclude?

2. Now repeat all the steps for the “chow” diet.


Check list


                                                      “hf” diet

                                                                                                           “chow” diet

                                             Histogram





                                              QQ plot





Shapiro-Wilk test



Kolmogorov-Smirnov test



Anderson-Darling test



After transformation

                                             Histogram





                                              QQ plot





Shapiro-Wilk test



Kolmogorov-Smirnov test



Anderson-Darling test