Scenario: In this scenario, we return to the data from the American Time Use Survey

(TimeUse). Our data table contains observations from approximately 16,000 respondents in 2003, 2007, and 2017. Use the Data Filter to select and include just the 2003 responses.

a. Complete the steps necessary to create a shadowgram of the Sleeping data (that is, time spent sleeping). Paste a copy of the graph in your report and comment on what you see.

b. Construct a normal quantile plot for the Sleeping column. Do you think that a normal model is suitable for this variable? Explain.

c. Repeat steps a and b for the column containing the ages of the respondents.

d. Repeat steps

a, b, and c for the 2017 data. Comments on changes (if any) that you observe.