Regression problems

1. Recall that the correlation between age and testosterone was -.99. The average age was 60 with a SD of 12.91 and the average testosterone level was 868 with a SD of 40.36. What testosterone level would you predict for a man who is 35?

2. You want to predict the amount someone will pay for auto insurance based on the number of years they've been driving. The unstandardized regression coefficient is -1.55. The average years people have been driving was 11.25 and the average cost of insurance per month was $59.25. How much money would you expect a person to pay if they had been driving for 5 years?

3. Recall that the correlation between ice cream consumed and temperature was .96. The mean for ice cream consumption was 1.54 pounds per month with a SD of 1.06 and the mean for temperature was 60.17 with a SD of 14.65. You want to predict the temperature based on the amount of ice cream eaten. Imagine someone ate 1.5 pounds of ice cream in a month. What might the temperature be?