Section S.2 – Solutions to the Practice Problems
- quantitative
- qualitative
- qualitative
- quantitative
- quantitative
- quantitative
7.
a. quantitative
b. quantitative
c. qualitative
d. quantitative
e. quantitative
f. qualitative
g. qualitative
h. quantitative
i. quantitative
j. quantitative
8.
- a.
| Sport | Frequency | Relative Frequency |
|---|---|---|
| Football | 5 | 0.25 |
| Soccer | 4 | 0.2 |
| Baseball | 4 | 0.2 |
| Cheerleading | 2 | 0.1 |
| Basketball | 4 | 0.2 |
| Swimming | 1 | 0.05 |
| Total | 20 | 1 |
b. 
c. 
d. 
9.
a.
| Type of Pet |
Frequency |
Relative Frequency |
|---|---|---|
| Dog |
9 |
0.375 |
| Cat |
6 |
0.250 |
| Bird |
4 |
0.167 |
| Turtle |
2 |
0.083 |
| Hamster |
2 |
0.083 |
| Fish |
1 |
0.042 |
|
Total |
24 |
1.000 |
b. 
c.
10. 
11. 0.25(20) = 5
12. 0.26($2600) = $676
13. The graph needs a title, the axes need to be labeled (including units), the 3D makes the graph difficult to read.
14.
a.
|
Test Score |
Frequency |
|---|---|
|
30 |
1 |
|
40 |
0 |
|
50 |
4 |
|
60 |
3 |
|
70 |
6 |
|
80 |
5 |
|
90 |
2 |
|
100 |
3 |
|
|
n = 24 |
b. 
15.
|
Number of Cars |
Frequency |
Relative-Frequency |
|---|---|---|
|
1 |
9 |
0.375 |
|
2 |
10 |
0.417 |
|
3 |
3 |
0.125 |
|
4 |
2 |
0.083 |
|
|
n = 24 |
1.000 |
b. 
16.
a. 15 people
b. 33.33%
17.
a. 19 orders
b. about 21%
