A sample of the purchases of several Corner Convenience Store customers resulted in the following sample data (x  number of items purchased per customer):

x 1 2 3 4 5 f 6 10 9 8 7

a. What does the 2 represent?

b. What does the 9 represent?

c. How many customers were used to form this sample?

d. How many items were purchased by the customers in this sample?

e. What is the largest number of items purchased by one customer?

Find each of the following (show formulas and work):

f. Mode g. Median h. Midrange i. Mean j. Variance k. Standard