Reconsider the previous exercise on BMI and blood glucose levels.
a. Determine a 95% confidence interval for the population slope coefficient and interpret what this interval represents.
b. Based on your confidence interval, is there a positive association between BMI and blood glucose levels? Explain.

Data form previous exercise

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 blood glucose levels and the results are in the file BMIGlucose. We are interested in seeing if there is an association between BMI and glucose levels.