1. A ________ represents all possible subjects of interest.

A. Parameter

B. Population

C. Sample

D. Statistic

2.A ________ is a portion of a population that is representative of the population from which it is selected.

A. Parameter

B. Survey

C. Sample

D. Statistic

3.A data set has 60 observations with a minimum value equal to 30 and a maximum value equal to 72. Determine the class width if the number of classes is six.

A. 4

B. 5

C. 6

D. 7

4.Histograms displaying continuous data have gaps between their bars.

A. True

B. False

5.A frequency distribution is a table that shows the number of data observations that fall into specific intervals.

A. True

B. False

6. The following table shows the percentage of e-mails that are sent each day of the business week according to an Intermedia survey.

Day	Percentage
Monday	15%
Tuesday	23%
Wednesday	22%
Thursday	21%
Friday	19%

Which of the following best displays this data?

A. horizontal bar chart

B. vertical bar chart

C. pie chart

D. histogram

7.The following is the number of hours students worked per week at after-school jobs.

2	2	4	6	7	8	10	10	12	13
13	15	17	17	17	17	20	20	21	23

Use the data to complete the following frequency distribution.

Number of Hours	Frequency
0 -4
5 - 9
10 - 14
15 - 19
20 - 24

A. Frequency: 3, 3, 4, 6, 4

B. Frequency: 3, 3, 5, 4, 5

C. Frequency: 3, 3, 5, 5, 4

D. Frequency: 3, 2, 6, 5, 4

8.The following is the number of hours students worked per week at after-school jobs.

2	2	4	6	7	8	10	10	12	13
13	15	17	17	17	17	20	20	21	23

Use the data to complete the following relative frequency distribution.

Number of Hours	Relative Frequency
0 -4
5 - 9
10 - 14
15 - 19
20 - 24

A. Relative frequency: 0.15, 0.15, 0.20, 0.30, 0.20

B. Relative frequency: 0.15, 0.15, 0.25, 0.20, 0.25

C. Relative frequency: 0.15, 0.15, 0.25, 0.25, 0.20

D. Relative frequency: 0.15, 0.10, 0.30, 0.25, 0.20

9.The following data represents the number of Sony TVs sold per day at a particular Costco over a random sample of five business days.

9 2 7 7 5

The mean of this sample is ________

A. 5.7

B. 6.0

C. 6.4

D. 6.6

10.The following data represents the number of Sony TVs sold per day at a particular Costco over a random sample of five business days.

9 2 7 7 5

The median of this sample is _______

A. 4.0

B. 5.0

C. 7.0

D. 9.0

11.The following data represents the number of Sony TVs sold per day at a particular Costco over a random sample of five business days.

9 2 7 7 5

The mode of this sample is _____

A. 2

B. 4

C. 6

D. 7

12.The following data represents the number of Sony TVs sold per day at a particular Costco over a random sample of five business days.

9 2 7 7 5

The range of this sample is _____

A. 5

B. 6

C. 7

D. 8

13.The ________ is the value that appears most often in a data set.

A. mean

B. median

C. mode

D. range

14. The ________ can be found by subtracting the lowest value from the highest value in the data set.

A. standard deviation

B. variance

C. median

D. range

15.The following data represents the number of Sony TVs sold per day at a particular Costco over a random sample of five business days.

9 2 7 7 5

The standard deviation of this sample is ________.

A. 1.2

B. 1.5

C. 2.0

D. 2.6

16. Use the given frequency distribution to find the

(a) class width.

(b) class midpoints of the first class.

(c) class boundaries of the first class.

Height (inches)
Classes	Frequency
50 - 52	5
53 - 55	8
56 - 58	12
59 - 61	13
62 - 64	11

A. (a) 3 (b) 51 (c) 50-52

B. (a) 3 (b) 51 (c) 49.5-52.5

C. (a) 2 (b) 51.5 (c) 50-52

D. (a) 2 (b) 51.5 (c) 49.5-52.5

17.The following frequency distribution displays the daily sales of muffins at Avalon Bakery.

Number Sold	Frequency
1-7	5
8-14	8
15-21	13
22-28	21
29-35	3

How many days of data are included in this frequency distribution?

A. 25

B. 50

C. 75

D. 100

18.Calculate the mean of the frequency distribution.

Kilometers (per day)
Classes	Frequency
1 - 2	7
3 - 4	15
5 - 6	30
7 - 8	11
9- 10	9

A. 15.5

B. 5.5

C. 6.5

D. 396

19.Calculate the variance of the frequency distribution.

Kilometers (per day)
Classes	Frequency
1 - 2	7
3 - 4	15
5 - 6	30
7 - 8	11
9- 10	9

A. 360

B. 5.0

C. 6.5

D. 72.0

20.Calculate the standard deviation of the frequency distribution.

Kilometers (per day)
Classes	Frequency
1 - 2	7
3 - 4	15
5 - 6	30
7 - 8	11
9- 10	9

A. 18.97

B. 2.24

C. 8.49

D. 3.45