5. Complete the following parts using a data set about popular diets (PopularDiets.csv). The data dictionary for the data set is found in the le DietDataDescription.pdf. The journal article that explains the study with results is in the le JournalArticleForDietStudyJ 00402 14. You will need to browse the journal article to answer parts a) and c). a) Was this study an observational study or an experiment? Briey explain. b) What participants were sampled for this study? 0) What do you believe to be the population of interest? Do you think the results can be generalized to the population of interest or some other population? Explain. d) Read in the data. Set variables to factors as needed. How many observations are in the data set? How many of the subjects completed the study? e) Explore the weight loss variable. Present summary statistics and two graphs (your choice) that provide insight into the distribution of this variable. Summarize your overall ndings for the distribution of weight loss by describing the information you get from the summary statistics and graphs. What numeric statistics do you think are best to use to summarize the distribution? Explain. f) Explore how weight loss varies by type of diet. [Hint: use comparative box plots; maybe facet histograms by diet type] Make a qualitative assessment regarding differences in the distribution of weight loss by diet type