7. Chapter 4, Section 4.2, Additional Exercises, Exercise 4.36 AaAa A sample of

Question

7. Chapter 4, Section 4.2, Additional Exercises, Exercise 4.36 AaAa A sample of 548 ethnically diverse students from Massachusetts was followed over a 19-month period from 1995 to 1997 in a study of the relationship between TV viewing and eating habits (Pediatrics (2003]: 1321-1326). For each additional hour of television viewed per day, the number of fruit and vegetable servings per day was found to decrease on average by 0.14 serving For this study, what is the response variable? What is the predictor variable? The response variable ( variable ( ) is the per day, and the predictor is the per day. Would the least squares regression line for predicting number of servings of fruits and vegetables using number of hours spent watching TV have a positive or negative slope? Justify your choice The least squares regression line would have a slope because the for each additional Graded

Explanation / Answer

(1)

The response variable (y) is the number of fruit and vegetable servings per day. , and the predictor vaiiable (x) is the hours of television viewing per day.

(2) The slope will be negative.

REASON: For each unit increase in x there is corresponding decrease in y

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