Q4
Obesity and exercise. The centers for Disease Control and Prevention (CDC) has estimated that 19.8% of Americans over 15 years old are obese. The CDC conducts a survey on obesity and various behaviors. Here is a table on self-reported exercise classified by body mass index (BMI):
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Are these percentages column percentages, row percentages, or table percentages?
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Use graphical displays to show different percentages of physical activities for the three BMI groups (Use SPSS).
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Do these data prove that lack of exercise causes obesity? Explain.
Q2
The histogram shows the annual salaries for 20 selected Employees at a Local Company.
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From the histogram, would you expect the mean or median to be larger? Explain.
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Write down few sentences about the shape of the histogram
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Which of the summary statistics would you choose to summarize the center and spread in these data? Why?
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