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1. |
Find the standard deviation of the data in the stem-and-leaf plot to the nearest hundredth. |
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A. |
228.50 |
B. |
11.74 |
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C. |
217.00 |
D. |
10.72 |
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Hint |
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2. |
Find the standard deviation of the set {15, 42, 30, 22, 19, 32} to the nearest hundredth. |
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A. |
10.03 |
B. |
10.14 |
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C. |
9.05 |
D. |
9.91 |
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Hint |
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3. |
The scores on a national achievement test are normally distributed with a mean of 50 and a standard deviation of 10. Out of a group of 200 students, how many would you expect to score more than 70? |
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A. |
1 |
B. |
5 |
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C. |
10 |
D. |
32 |
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Hint |
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4. |
Which of the graphs will have the lowest standard deviation? |
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A. |
 |
B. |
 |
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C. |
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D. |
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Hint |
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5. |
Compute the variance and standard deviation for the set of {3, 4, 4, 7, 9, 9, 12, 16}. Round to the nearest tenth. |
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A. |
16.5; 4.1 |
B. |
17.5; 4.2 |
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C. |
15.8; 4.0 |
D. |
4.2; 2.0 |
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Hint |
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