chapter 13 test review

CHAP

TER

13 T

EST

REVI

EWStatisticsReview

MGF 1106

Fall 2011

20, 25, 25, 29, 31

Determine the following for the data listed above:

Mean

Mode

Range

Median

Midrange

a) 25.5, 25, 51, 25, 26

b) 26, 51, 25.5, 25, 11

c) 26, 25, 11, 25, 25.5

d) 26, 11, 25, 25, 25.5

20, 25, 25, 29, 31

What is the standard deviation for the data above?

a) 26

b) 4.24

c) 18

d) 3.96

5 9 14 20 27 327 11 15 23 28 347 12 17 23 29 358 14 18 24 30 359 14 18 25 30 37

Use the set of data to construct a frequency of distribution; let the first class be 5-10.

Class Freq.

5-10 6

11-16 6

17-22 4

23-28 6

29-34 5

35-37 3

Class Freq.

5-10 6

10-15 6

15-20 5

20-25 5

25-30 6

30-37 7

Class Freq.

5-10 6

11-16 6

17-22 5

23-28 5

29-34 6

35-40 7

Class Freq.

5-10 6

11-16 6

17-22 4

23-28 6

29-34 5

35-40 3

A. B. C. D.

5 9 14 20 27 327 11 15 23 28 347 12 17 23 29 358 14 18 24 30 359 14 18 25 30 37

Use the set of data to construct a histogram of the frequency of distribution.

A. B. C.

7.513.5

19.525.5

31.537.5

0

2

4

6

Scores

Freq

uenc

y

7.513.5

19.525.5

31.537.5

0

2

4

6

8

Scores

Freq

uenc

y

7.513.5

19.525.5

31.537.5

0

2

4

6

ScoresFr

eque

ncy

5 9 14 20 27 327 11 15 23 28 347 12 17 23 29 358 14 18 24 30 359 14 18 25 30 37

Use the set of data to construct a frequency polygon of the frequency of distribution.

A. B. C.

7.513.5

19.525.5

31.537.5

0

2

4

6

Scores

Freq

uenc

y

5-10

11-16

17-22

23-28

29-34

35-40

0

2

4

6

8

Scores

Freq

uenc

y

5-10

10-15

15-20

20-25

25-30

35-40

01234567

ScoresFr

eque

ncy

What is the most common score?a) 81

b) 83

c) 80

d) 95

Mean 81 First Quartile 60

Median 83 Third Quartile 89

Mode 80 90th Percentile 95

Standard Deviation 9

The following data represents Algebra II test scores.

What score did half of the students exceed?

a) 81

b) 83

c) 80

d) 95

Mean 81 First Quartile 60

Median 83 Third Quartile 89

Mode 80 90th Percentile 95

Standard Deviation 9

The following data represents Algebra II test scores.

About what percent of students’ grades exceeded 89?

a) 25

b) 50

c) 75

d) 100

Mean 81 First Quartile 60

Median 83 Third Quartile 89

Mode 80 90th Percentile 95

Standard Deviation 9

The following data represents Algebra II test scores.

About what percent of students’ grades were less than 95?

a) 5

b) 90

c) 60

d) 95

Mean 81 First Quartile 60

Median 83 Third Quartile 89

Mode 80 90th Percentile 95

Standard Deviation 9

The following data represents Algebra II test scores.

If there are 100 students enrolled in Algebra II, what would be the total of all the scores?

a) 81

b) 8300

c) 8100

d) 8000

Mean 81 First Quartile 60

Median 83 Third Quartile 89

Mode 80 90th Percentile 95

Standard Deviation 9

The following data represents Algebra II test scores.

What test score represents one standard deviation above the mean?

a) 81

b) 90

c) 9

d) 72

Mean 81 First Quartile 60

Median 83 Third Quartile 89

Mode 80 90th Percentile 95

Standard Deviation 9

The following data represents Algebra II test scores.

What test score represents 1.5 standard deviations below the mean?

a) 81

b) 90

c) 67.5

d) 72.5

Mean 81 First Quartile 60

Median 83 Third Quartile 89

Mode 80 90th Percentile 95

Standard Deviation 9

The following data represents Algebra II test scores.

The average price for a medium cup of coffee in Center Town is normally distributed with a mean

of $1.97 and a standard deviation of $0.23.

What percent of cups of coffee sold were between $1.75 and $2.15?

a) 16%

b) 78%

c) 61%

d) 95%

The average price for a medium cup of coffee in Center Town is normally distributed with a mean

of $1.97 and a standard deviation of $0.23.

What percent of cups of coffee were sold for greater than $1.50?

a) 98%

b) 2%

c) 20%

d) 47%

The average price for a medium cup of coffee in Center Town is normally distributed with a mean

of $1.97 and a standard deviation of $0.23.

What percent of cups of coffee were sold for greater than $2.00?

a) 55%

b) 1%

c) 45%

d) 3%

The average price for a medium cup of coffee in Center Town is normally distributed with a mean

of $1.97 and a standard deviation of $0.23.

What percent of cups of coffee were sold for less than $2.00?

a) 84%

b) 10%

c) 16%

d) 90%