It has been suggested by researchers (e.g., Crosnoe, 2006) that academic performance can be used to predict alcohol consumption among high school students. Assume that an r of €“.54 describes the relationship between academic performance and estimated weekly alcohol consumption. Additional summary information is shown below.

Academic Performance (X) .....................................  Weekly Alcohol Consumption in Ounces (Y)
XÌ… = 70 ......................................................................... YÌ… = 58
SS_x = 8,424 ................................................................. SS_y = 41,091.84

a. Determine the least squares equation for predicting alcohol consumption from academic performance using the slope and intercept formulas shown below.

a = YÌ… - bXÌ…

b. Josh€™s academic performance is 75. What is his predicted alcohol consumption?

c. Jim€™s academic performance is 92. What is his predicted alcohol consumption?

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