1. Use a formula to calculate the mean of the sample data given in the frequency distribution.

Show your work.

Number of Cups of Coffee	Frequency
0-2	10
3-5	8
6-8	4
9 - 11	5
12 - 14	3

2. A population consists of six calculators with costs of $15, $18, $126, $114, $25, $126

Use formulas to calculate the mean. Show your work. Label with the correct variable, and round to the correct number of decimal places.

3. What is the difference between x and ?

4. The sample data below consists of the age, in years, of the employees in a chain of restaurants.

{26, 19, 31, 18, 15, 27, 17, 19, 16, 17, 17, 21, 58, 19, 22, 19, 39, 20, 21, 27}

a. Find the mean of the sample using your calculator. Record the calculator command used as well as the result.

b. Calculate the midrange of the data.

c. Find the median, by hand. Show your work.

5. For the sample data, in pounds, {3.5, 4.6, 4.6}, what is the correct mean? Circle your answer.

A. = 4 lb

B. = 4.2 lb

C. = 4.23 lb

D. = 4.233 lb

E. = 4.233 lb

F. = 4.23 lb

G. = 4.2 lb

H. = 4 lb