Glycemic load is a number that describes the quantity and quality of carbohydrates in food. For example, a muffin or a piece of cake has a very high glycemic load number, because each contains lots of carbohydrates of the type that will quickly raise someone’s blood sugar level. Are these types of foods also addictive? Researchers from Michigan (Schulte et al., 2015) asked 398 participants to rate how likely they were to experience addictive-like eating behaviors with 35 foods on a 7-point scale (1 = not problematic at all, 7 = extremely problematic). Averages from these ratings along with the glycemic load for these 35 foods are in the file AddictiveFoods. Put the data file into the Corr/Regression applet to answer (a)–(d). (Make sure you have the glycemic load—GL—as the explanatory variable.) 

a. Describe the direction, form, and strength of the association between glycemic load and the mean rating. 

b. What are the observational units in this study? 

c. Pizza has the highest mean addictive rating, 4.01. What is the glycemic load of pizza? Is it the largest of the 35 foods shown? 

d. There are a number of foods, including cheese, that have a glycemic index of 0. Cheese has the highest mean addictive rating of these foods. What is it?