1. Statistics Review MGF 1106 Fall 2011
Chapter 13 Test Review

2. 20, 25, 25, 29, 31 Determine the following for the data listed above:
Mean
Mode
Range
Median
Midrange
25.5, 25, 51, 25, 26
26, 51, 25.5, 25, 11
26, 25, 11, 25, 25.5
26, 11, 25, 25, 25.5

3. What is the standard deviation for the data above?
20, 25, 25, 29, 31
What is the standard deviation for the data above? 26
4.24 18
3.96

4.
Use the set of data to construct a frequency of distribution; let the first class be 5-10.
A. B. C. D.
Class
Freq.
5-10 6
11-16
17-22 4
23-28
29-34 5
35-37 3
Class
Freq.
5-10 6
10-15
15-20 5
20-25
25-30
30-37 7
Class
Freq.
5-10 6
11-16
17-22 5
23-28
29-34
35-40 7
Class
Freq.
5-10 6
11-16
17-22 4
23-28
29-34 5
35-40 3

5.
Use the set of data to construct a histogram of the frequency of distribution.
A. B. C.

6.
Use the set of data to construct a frequency polygon of the frequency of distribution.
A. B. C.

7. What is the most common score?
The following data represents Algebra II test scores.
Mean 81
First Quartile 60
Median 83
Third Quartile 89
Mode 80
90th Percentile 95
Standard Deviation 9
What is the most common score? 81 83 80 95

8. What score did half of the students exceed?
The following data represents Algebra II test scores.
Mean 81
First Quartile 60
Median 83
Third Quartile 89
Mode 80
90th Percentile 95
Standard Deviation 9
What score did half of the students exceed? 81 83 80 95

9. About what percent of students’ grades exceeded 89?
The following data represents Algebra II test scores.
Mean 81
First Quartile 60
Median 83
Third Quartile 89
Mode 80
90th Percentile 95
Standard Deviation 9
About what percent of students’ grades exceeded 89? 25 50 75
100

10. About what percent of students’ grades were less than 95?
The following data represents Algebra II test scores.
Mean 81
First Quartile 60
Median 83
Third Quartile 89
Mode 80
90th Percentile 95
Standard Deviation 9
About what percent of students’ grades were less than 95? 5 90 60 95

11. The following data represents Algebra II test scores.
Mean 81
First Quartile 60
Median 83
Third Quartile 89
Mode 80
90th Percentile 95
Standard Deviation 9
If there are 100 students enrolled in Algebra II, what would be the total of all the scores? 81
8300
8100
8000

12. What test score represents one standard deviation above the mean?
The following data represents Algebra II test scores.
Mean 81
First Quartile 60
Median 83
Third Quartile 89
Mode 80
90th Percentile 95
Standard Deviation 9
What test score represents one standard deviation above the mean? 81 90 9 72

13. What test score represents 1.5 standard deviations below the mean?
The following data represents Algebra II test scores.
Mean 81
First Quartile 60
Median 83
Third Quartile 89
Mode 80
90th Percentile 95
Standard Deviation 9
What test score represents 1.5 standard deviations below the mean? 81 90
67.5
72.5

14. What percent of cups of coffee sold were between $1.75 and $2.15?
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?
16%
78%
61%
95%

15. What percent of cups of coffee were sold for greater than $1.50?
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?
98% 2%
20%
47%

16. What percent of cups of coffee were sold for greater than $2.00?
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?
55% 1%
45% 3%

17. What percent of cups of coffee were sold for less than $2.00?
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?
84%
10%
16%
90%