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1. |
Find the mean of {3, 8, 10, 1, 25}. |
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A. |
9.4 |
B. |
9 |
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C. |
1 |
D. |
8 |
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Hint |
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2. |
You have scores of 62, 75, and 90 on three of your history exams. What do you need to get on your fourth exam for a mean of 80? |
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A. |
80 |
B. |
97 |
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C. |
100 |
D. |
93 |
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Hint |
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3. |
Find the range of {5, 21, 2, 14, 13}. |
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A. |
13 |
B. |
14 |
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C. |
19 |
D. |
65 |
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Hint |
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4. |
Which relationship would most likely have a positive correlation? |
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A. |
the number of miles driven, and the number of gallons of gas in the car. |
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B. |
the rate at which a train travels, and the time it takes for it to reach its destination. |
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C. |
the amount of memory in computer, and the number of keys on the keyboard. |
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D. |
the number of tickets sold for a baseball game, and the number of hotdogs sold at the game. |
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Hint |
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5. |
Make a flowchart for the expression. . |
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A. |
 |
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B. |
 |
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C. |
 |
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D. |
 |
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Hint |
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6. |
Which scatter plot shows that x and y have a negative correlation? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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7. |
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. |
unbiased, because they are using a systematic random sample |
B. |
biased, because a library loans out primarily books |
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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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8. |
Find  . |
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A. |
 |
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B. |
 |
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C. |
impossible |
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D. |
 |
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Hint |
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9. |
Find  . |
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A. |
 |
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B. |
 |
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C. |
 |
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D. |
 |
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Hint |
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10. |
Find B – A. |
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A. |
 |
B. |
 |
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C. |
 |
D. |
impossible |
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Hint |
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11. |
How many children attend this child care facility? |
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A. |
70 |
B. |
100 |
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C. |
6 |
D. |
14 |
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Hint |
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12. |
To ensure healthy food, every tenth item is checked. What kind of sample is this? |
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A. |
Random Sampling |
B. |
Systematic Sampling |
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C. |
Cluster Sampling |
D. |
Convenience Sampling |
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Hint |
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13. |
Find the range of {120, 42, 62, 44, 20, 42, 112}. |
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A. |
100 |
B. |
42 |
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C. |
63 |
D. |
44 |
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Hint |
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14. |
Which value occurs most often? |
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A. |
84 |
B. |
77 |
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C. |
99 |
D. |
71 |
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Hint |
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15. |
Which relationship will most likely have a positive correlation? |
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A. |
Battery power of a flashlight, and continued use of the flashlight. |
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B. |
The number of movie tickets sold and the amount of popcorn sold. |
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C. |
A person's height and a person's eye color. |
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D. |
Rising temperatures and ski equipment sales. |
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Hint |
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16. |
Using the box-and-whisker plot, what is the least value of the data for exam A? |
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A. |
65 |
B. |
50 |
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C. |
83 |
D. |
45 |
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Hint |
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17. |
Using the box-and-whisker plot, what is the first quartile of Exam B? |
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A. |
72 |
B. |
83 |
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C. |
63 |
D. |
75 |
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Hint |
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18. |
Find the interquartile range of
{61, 65, 65, 66, 72, 75, 77, 79, 81, 85, 89, 92, 99}. |
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A. |
35 |
B. |
21.5 |
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C. |
25 |
D. |
77 |
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Hint |
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19. |
What appears to happen in the graph? |
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A. |
Sales have cut in half each month. |
B. |
Sales have doubled each month. |
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C. |
Sales have dropped. |
D. |
Sales have slightly increased. |
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Hint |
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20. |
What is B – C? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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