Professor Jones has created a formula with which students can predict their grade on the final examination based on their total scores on the first two examinations. The prediction equation is ' = 2X + 30, where X is the total number of points the student has earned on the first two tests. The final examination has these characteristics: mean = 300 and standard deviation = 100. The correlation between total score on the first two tests and the final is .80. Kelly scored a total of 60 on the first two tests.

1. Predict Kelly's score on the final examination.

4. Assume that a test had the following characteristics: mean of X = 50; mean of Y = 500; standard deviation of X = 10; standard deviation of Y = 100; r = .80. Calculate the standard error of estimate.

5. The line of best fit for predicting Y from X is defined as ' = 10*X + 40. Jamie scored 40 on X. What is Jamie's predicted score on Y?