a statistics instructor wants to use the number of hours studied to predict exam scores in his class. he wants to use a linear regression model. data from previous years shows that the average number of hours studying for a final exam in statistics is 8.5, with a standard deviation of 1.5, and the average exam score is 75, with a standard deviation of 15. the correlation is .76. should the instructor use linear regression to predict exam scores for a student who studied 10 hours for the final? write the letter of the correct answer.