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1. |
Find the standard deviation of the set {15, 42, 30, 22, 19, 32} to the nearest hundredth. |
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A. |
9.91 |
B. |
9.05 |
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C. |
10.14 |
D. |
10.03 |
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Hint |
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2. |
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. |
5 |
B. |
1 |
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C. |
10 |
D. |
32 |
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Hint |
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3. |
Compute the variance and standard deviation for the set of {7,7,7,7}. Round to the nearest tenth. |
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A. |
0; 7 |
B. |
7; 0 |
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C. |
0; 0 |
D. |
0; 28 |
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Hint |
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4. |
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. |
15.8; 4.0 |
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C. |
4.2; 2.0 |
D. |
17.5; 4.2 |
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Hint |
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5. |
Compute the variance and standard deviation for the set of {284, 298, 302, 305, 310, 314, 321, 331, 337, 348}. Round to the nearest tenth. |
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A. |
335.7; 18.3 |
B. |
337.9; 18.4 |
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C. |
289.2; 17.0 |
D. |
341.0; 18.5 |
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Hint |
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