Name:    10-2: Measures of Central Tendency

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

1.

What is the mean of the following set of data?
9, 25, 1, 5, 21, 21, 4, 14
 a. 12.5 c. 17.5 b. 15.5 d. 15

2.

The table shows the time spent surfing the Internet in one week for several students. Organize the data and find the mean, median, and mode.

 Student Time on the Internet (min) J.K. 67 T.L.R. 123 B.D. 57 C.H.W. 13 T.W. 170 F.P. 43 L.G. 59
 a. mean = 76, median = 59, no mode c. mean = 59, median = 74, no mode b. mean = 61, median = 76, mode = 59 d. mean = 74, median = 59, no mode

3.

Find the mean, median, and mode of the set of data below.
5, 8, 13, 9, 5, 6, 11, 2, 4
Which statement is false?
 a. The mode is 5. c. The median is 5. b. The mean is 7. d. none of these

4.

The price of a dozen roses usually increases around Valentine’s Day. The chart below shows the price of a dozen roses at one florist’s shop in various months of the year. Find the mean, median, and mode for the prices.

 Month \$ Dozen Roses February \$44.50 April \$34.00 June \$23.75 August \$27.50 October \$31.50 December \$39.75
 a. mean = \$34.00, median = \$31.50, mode = \$23.75 b. mean = \$32.75, median = \$25.63, mode = \$44.50 c. mean = \$32.75, median = \$31.50, no mode d. mean = \$33.50, median = \$32.75, no mode

5.

It is estimated that over two-thirds of American households have a collection of pennies. In a random poll, 10 people were asked how many pennies they had in their penny collection. The list below shows the amount of pennies people had in their collections:

 350 2500 825 200 1500 200 1000 750 50 250

Find the mean, median, and mode of the data. Which statement is true?
 a. The mode is 250. c. The mean is 762.50. b. The median is 750. d. none of these

6.

Find the mean, median, and mode of the set of data below.
6, 13, 23, 17, 19, 11, 3, 20, 15, 7, 22, 11, 15
 a. mean = 14, median = 15, mode = 11, 15 b. mean = 14, median = 14, mode = 11 c. mean = 15, median = 15, mode = 15 d. none of these

7.

What is the median of the following set of data?
24, 20, 25, 7, 12, 25, 8, 27, 28
 a. 28 c. 26.5 b. 24 d. 25.9

8.

What is the mode of the following set of data?
6, 14, 5, 5, 11, 7, 2, 5, 4, 10
 a. 5 c. 6 b. 2 d. 14

9.

Find the range of the data.
22, 13, 16, 25, 1
 a. 23 c. 25 b. 26 d. 24

10.

Which set of data was used to make the stem-and-leaf plot?
 Stem Leaf 1 4 2 4 5 3 6
 a. 14, 245, 36 c. 14, 24 25, 36 b. 4, 4, 5, 6 d. 1.4, 2.4, 2.5, 3.6

11.

Find the mode of these data: 7, 5, 5, 3, 9, 8, 9, 4, 9.
 a. 5 c. 6.6 b. 7 d. 9

12.

Find the mean of these data: 95.2, 94.8, 91.8, 97.8, 92.4, 88.4, 103.9.
 a. 97.8 c. 94.9 b. 94.8 d. no mean

13.

If all the numbers in a set of data occur the same number of times, then the set has no
 a. mean c. median b. mode d. central density

14.

Find the mean of the data to the nearest hundredth.
34, 19, 28, 33, 11, 4, 27, 13, 25

15.

The price of a small soft drink varies considerably depending on where you buy it. The chart shows the cost of a small soft drink at different restaurants, food marts, and deli shops. Find the mean, median, and mode for the prices listed in the chart.

 Place Price of Soft Drink A \$0.79 B \$0.59 C \$0.95 D \$1.75 E \$1.25 F \$1.00 G \$0.79 H \$1.20

16.

Find the mean, median, and mode for the set of data.
2.1   6.7   4.7   3.8   8.9   3.9   5.1   4.0

17.

Find the mean, median, and mode for the set of data.
4, 8, 1, 6, 9, 3, 3, 2, 4, 1, 5, 4, 1, 8, 4

18.

The cost of a doctor’s visit varies from state to state. Data for several states is given below. Find the mean, median, and mode for the data.

 NY \$68 IA \$45 CA \$63 IL \$57 ME \$58 NH \$47 KY \$46 OR \$62 NJ \$55

19.

The chart lists the public high school graduation rates for last year. Find the mean, median, and mode for the data.

 State Rate (%) Oregon 71.6 Pennsylvania 87.5 Rhode Island 73.6 South Carolina 61.4 Tennessee 67.8 Texas 65.9

20.

Find the median of the data.
5, 9, 10, 21, 25, 4, 1, 23, 29

21.

Find the mode of the data.
11, 13, 12, 21, 1, 14, 6, 21, 5, 21

22.

Find the range of the data.
47, 41, 36, 39, 40, 39, 39, 35, 43, 49