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1. |
Find the mode of {325, 100, 115, 621, 325, 325, 100}. |
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A. |
325 |
B. |
100 |
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C. |
115 |
D. |
273 |
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Hint |
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2. |
Which scatter plot shows that x and y have a positive correlation? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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3. |
Every fifth person that comes out of a library is asked whether they prefer to read a book or watch a movie. Is this biased or unbiased and why? |
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A. |
biased, because a library loans out primarily books |
B. |
unbiased, because they are using a systematic random sample |
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C. |
biased, because the sample is not representative of everyone in the library |
D. |
unbiased, because the location is not important |
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Hint |
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4. |
What are the dimensions of the matrix ? |
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A. |
2 × 3 |
B. |
3 × 2 |
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C. |
6 |
D. |
4 × 2 |
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Hint |
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5. |
Find B – A. |
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A. |
impossible |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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6. |
The least number of children fall in which interval? |
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A. |
15-29 months |
B. |
cannot be determined |
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C. |
0-14 months |
D. |
30-44 months |
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Hint |
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7. |
A histogram is a graph in which the data are organized into equal _______. |
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A. |
intervals |
B. |
elements |
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C. |
tallies |
D. |
bars |
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Hint |
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8. |
Find the median of the data. |
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A. |
42.5 |
B. |
23 |
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C. |
29.5 |
D. |
19.5 |
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Hint |
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9. |
To ensure healthy food, every tenth item is checked. What kind of sample is this? |
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A. |
Convenience Sampling |
B. |
Systematic Sampling |
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C. |
Random Sampling |
D. |
Cluster Sampling |
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Hint |
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10. |
What is the mode of the number of rainy days each month? |
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 |
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A. |
7 |
B. |
5 |
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C. |
6 |
D. |
8 |
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Hint |
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11. |
Which relationship will most likely have a positive correlation? |
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A. |
Rising temperatures and ski equipment sales. |
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B. |
Battery power of a flashlight, and continued use of the flashlight. |
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C. |
A person's height and a person's eye color. |
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D. |
Increasing snow inches, and sled sales. |
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Hint |
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12. |
Which relationship will most likely have a negative correlation? |
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A. |
The number of movie tickets sold and the amount of popcorn sold. |
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B. |
Battery power of a flashlight, and continued use of the flashlight. |
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C. |
A person's height and a person's eye color. |
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D. |
Increasing snow inches, and sled sales. |
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Hint |
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13. |
Using the box-and-whisker plot, what is the median of Exam B? |
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A. |
90 |
B. |
75 |
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C. |
83 |
D. |
60 |
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Hint |
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14. |
Find the interquartile range of
{61, 65, 65, 66, 72, 75, 77, 79, 81, 85, 89, 92, 99}. |
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A. |
77 |
B. |
25 |
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C. |
21.5 |
D. |
35 |
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Hint |
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15. |
What appears to happen in the graph? |
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A. |
Sales have doubled each month. |
B. |
Sales have cut in half each month. |
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C. |
Sales have dropped. |
D. |
Sales have slightly increased. |
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Hint |
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16. |
Why is the graph misleading? |
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 |
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A. |
Bars appear to have cut in half. |
B. |
Scale is not at even intervals. |
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C. |
Months are out of order. |
D. |
Color is misleading. |
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Hint |
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