Class Data I

The exercise uses data collected from 180 students enrolled in STAT 100, a beginning statistics course at the University of Illinois. The objective is to compare men and women on various measured characteristics such as height and weight. Click on Data under Chapter 1 in the left panel and then select Open remote ... under the File menu in the right panel. Select classdata.xml from the Open File Dialog and click OK. Note that Height, Weight, and DogsCats are assigned the Y role and Gender the Z role by default. Select y|z from the Graph menu.

1. Click on the Height histogram to bring it to the front. Generally, are men taller than women? Is there some overlap, or are men always taller than women?
2. Are the shapes of the men and women Height histograms similar or different? If different, in what ways?
3. Click on the Weight histogram to bring it to the front. Generally, are men heavier than women? Is there some overlap, or are men always heavier than women?
4. Are the shapes of the men and women Weight histograms similar or different? If different, in what ways?
5. Click on the DogsCats histogram to bring it to the front. In general, do men or women have more dogs and cats?
6. Of the people who have 20 or more dogs and cats, do they tend to be men or women or are they about the same?
7. What are the three highest numbers of dogs and cats owned? Do you think these numbers are exact? Why or why not?