Math 132
Exam 1 Review Solutions
The exam will have 10 problems. You will have the whole class period to do
the exam.
1.
2.
a.
b.
c.
d.
e.
f.
Rent 35%
Food 23%
Car 18%
Utilities 11%
Insurance 8% 28.8̊
Other 5%
12̊6̊
82.8̊
64.8̊
39.6̊
18̊
3.The following scores are from a test:
99, 59, 61 63, 89, 72, 71, 81, 89, 67, 93, 84
g. Create a stem and leaf plot
h. Find the mean, median, mode and range of these scores.
i. Draw a histogram representing these data
4.
Using the following scores, construct a box and whisker plot:
97, 94, 86, 84, 82, 81, 79, 78, 72, 64, 54
5. S.D. = 9.2
6. The 8 boys scored a total of 74 points.
7. There are many correct answers to this. One is: 1, 3, 3, 4, 5.
8. Shakoyia writes three forms of a test for her sixth grade science classes.
The table below gives some statistical data about the tests.
Form 1
66
4
Mean
Standard Deviation
Form 2
66
2
Form 3
72
6
Maria scored 70 on Form 1.
Janelle scored 90 on Form 2.
Luis scored 76 on Form 3.
Compare the three students’ performance using z-scores.
9. Sunny’s height is at the 16th percentile.
10.
Ed’s and Cairo’s scores are the same distance from the mean.
The difference is that Ed did less well than the average score, and Cairo
did better than the average.
11. Like the poster project.
12. 1. a. R1R2, RB RB RG,
RB RG, BB BG, BG.
b.
13. a.
14. a.
1
10
5
36
.11
b.
1
6
b. 8 to 1
RB
15. a.
d.
.6 b.
.7 c.
.7
No, P(E G) = .3 and P(E) P(G) = .4 .5 = .2 ≠ .3
16. a.
7
24
b.
7
24
c.
11
24
d.
17
24
18. a.
49
100
b.
7
15
19. a.
1
30
b.
3
10
20. a.
1
b.
8
27
64
17.
21.
65
81
c.
1
3
22. 0.38
23. 0.05
24. a.
b.
c.
762
≈ 0.69
1108
60
≈ 0.05
1108
346
≈ 0.31
1108