(Class Exercise) Refer to Exercises 1.11 and 1.12

(pages 21 and 22). Using the population defined by your class or using the Students data file, the instructor will select a variable, such as weekly time watching television.

(a) Construct a histogram or stem-and-leaf plot of the population distribution of the variable for the class.

(b) By generating random numbers, each student should select nine students at random and compute the sample mean response for those students. (Each student should use different random numbers.) Plot a histogram of the sample means obtained by all the students. How do the spread and shape compare to the histogram in (a)? What does this illustrate?