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1. |
Find the standard deviation of the set {4, 7, 3, 8, 2, 6, 5, 8, 3, 2} to the nearest hundredth. |
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A. |
2.23 |
B. |
2.00 |
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C. |
2.35 |
D. |
2.46 |
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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. |
9.91 |
D. |
9.05 |
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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. |
10 |
B. |
1 |
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C. |
32 |
D. |
5 |
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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. |
 |
D. |
 |
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Hint |
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5. |
Suppose that the mean is 50. How many standard deviations away is the value 65? |
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A. |
about 2 standard deviations |
B. |
within 1 standard deviation |
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C. |
cannot be determined from given information |
D. |
about 1 standard deviation |
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Hint |
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