All students who attend a certain college must take two exams. Both exams have a
ID: 2908857 • Letter: A
Question
All students who attend a certain college must take two exams. Both exams have a relating y second exam score and x first exam score is y 60+0.6x. Answer parts a. and b. below. a. Predict the second exam score for a student who has first exam score of 500. mean of 430 and a standard deviation of 70. The regression equation b. The correlation is 0.6. Interpret the prediction in part a. in terms of regression toward the mean. Choose the correct answer below. O A. The x-value is 1 standard deviations above the mean, so the predicted y-value is 0.6 standard deviations above the mearn. O B. The x-value is 0.6 standard deviations above the mean, so the predicted y-value is 06 standard deviations above the mean. O C. The x-value is 0.6 standard deviations above the mean, so the predicted y-value is 1 standard deviations above the mean. O D. The x-value is 1 standard deviations above the mean, so the predicted y-value is 1 standard deviations above the mean.Explanation / Answer
a) Predicted secon exam score = 60 + 0.6x500
= 60 + 300
= 360
b) A. The x value is 1 standard deviation above the mean, so, the predicted y value is 0.6 standard deviations above the mean.