Suppose GNC, a vitamin and supplement supplier, would like to investigate the relationship between the size of an order and the age of the customer who ordered it. This information could allow GNC to target its promotions to specific age groups. The following table shows the ages for seven randomly selected customers along with their most recent order sizes in dollars. This data can also be found in the Excel file GNC.xlsx.

Age Order Size ($) Age Order Size ($)

41 54 29 15 26 30 49 25 34 22 38 85 54 63

a. Construct a scatter plot for these data.

b. Calculate the correlation coefficient for this sample.

c. Using a = 0.05, perform a hypothesis test to determine if the population correlation coefficient is greater than zero?

d. What conclusions can be drawn based on these results?

AppendixLO1