Chapter 10.4, Exercise Question 11

In a study to see if there was an association between weight loss and the amount of a certain protein in a person's body fat, the researchers measured a number of different attributes in their 39 subjects at the beginning of the study. The article reported, "These subjects were clinically and ethnically heterogeneous." Two of the variables they measured were body mass index (BMI) and total cholesterol. The results are shown in the scatterplot along with the regression line.?

What are the observational units in the study?

Choose the answer from the menu in accordance to the question statement

a. 39 subjects

b. Body mass index

The equation of the least squares regression line for predicting total cholesterol from BMI is:

cholesterol?=162.56+0.9658????BMI

?The following null distribution was created to test the association between people's total cholesterol number and their BMI using the slope as the statistic. The null and alternative hypotheses for this test can be written as: Null: No association between cholesterol and BMI in the population.Alt: Association between cholesterol and BMI in the population.

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