Body mass index, or BMI, is a measure of weight in humans scaled to the square of the height. If we use data from the entire United States, 2% of individuals have BMI values less than 18.5; 39% have BMI values between 18.5 and 24.9; 36% have BMI values between 25.0 and 29.9; and 23% have BMI values equal to or above 30.0. We have conducted a survey in Framingham, Massachusetts and obtained the following data:
|
BMI Range |
# of Individuals |
|
<18.5 |
20 |
|
18.5-24.9 |
932 |
|
25.0-29.9 |
1374 |
|
³30.0 |
1000 |
A. Use a goodness of fit test (either the G-test or the chi-square test) to analyze your data, comparing expected values to the observed values. Be sure to interpret your results and explain your reasons for declaring them significant or not significant.
B. Why is the goodness of fit test the appropriate test here, rather than a test of independen
