Q) Open a file called "CEO-Compensation.xls". The file includes the total compensation (in $) of CEOs of 197 large public companies and their investment return in 2009. Compute the correlation coefficient between compensation and the investment return in 2009.

Q) Suppose that students' scores are in EC-521 quiz at startford are normally distributed with a mean of 73 and a standard deviation of 8.

a) Find the probability that a student scored below 91 on this quiz.

b) Find the probability that a student scored between 65 and 89.

c) The probability is 5% that a student taking the test scores higher than what grade?

Q) Suppose that the average consumption of sugar per person is normally distributed with a mean of 9.24 pounds and a standard deviation of 3 pounds.

a) Find the probability that an individual consumes more than 10 pounds of sugar.

b) Find the probability that an individual consumes between 3 and 5 pounds of sugar.

c) Find the probability that an individual consumes less than 5 pounds of sugar.

d) 99% of the people consumed less than how many pounds of sugar?

Q)Suppose that the distance traveled per truck per year is normally distributed with a mean of 50 thousand miles and a standard deviation of 12 thousand miles.

a) Find the proportion of trucks that can be expected to travel between 34 and 50 thousand miles in a year.

b) Find the percentage of trucks that can be expected to travel either below 30 or above 60 thousand miles in a year.

c) How many miles will be traveled by at least 80% of the trucks?