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1. |
The amount of fiber measured in grams in selected seven-grain products is 4, 10, 7, 7, 4, 1, and 1. Find the range of the data. |
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A. |
10 |
B. |
8 |
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C. |
7 |
D. |
9 |
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Hint |
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2. |
Determine the median of the set of data {67, 90, 83, 85, 73, 80, 78, 79, 68, 71}. |
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A. |
78.5 |
B. |
79 |
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C. |
77.5 |
D. |
78 |
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Hint |
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3. |
What is the standard deviation for the data {67, 90, 83, 85, 73, 80, 78, 79, 68, 71}? |
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A. |
about 7.17 |
B. |
about 51.44 |
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C. |
8 |
D. |
about 7.56 |
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Hint |
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4. |
The mean and standard deviation of a set of data are 30.5 and 13.8, respectively. Assume that the data are normally distributed. Name the interval about the mean in which about 68.3% of the data are located. |
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A. |
30.5 ± 1.0 |
B. |
30.5 ± 13.8 |
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C. |
30.5 ± 6.9 |
D. |
13.8 ± 1.0 |
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Hint |
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5. |
Given the partial table below, identify the upper and lower limits of an interval about the mean within which 45% of the values of a set of data can be found if the mean is 30.5 and the standard deviation is 13.8. Assume the data are normally distributed. |
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A. |
9.6-18.0 |
B. |
5.5-22.1 |
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C. |
22.22-38.78 |
D. |
26.3-34.7 |
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Hint |
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6. |
Use the partial table below. If = 57.0, N = 10, and = 147.9, find the interval about the sample mean that has a 5% level of confidence. |
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A. |
about 101.41-194.39 |
B. |
about 112.58-183.22 |
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C. |
about 99.91-195.89 |
D. |
about 118.17-177.63 |
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Hint |
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7. |
The set of data below shows the number of candles sold for each day of a school fund-raiser. Name the interval that describes the most candles sold. 4, 19, 28, 33, 26, 8, 14, 18, 21, 35, 36, 11, 25, 11,13, 44 |
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A. |
10–20 |
B. |
0–10 |
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C. |
30–40 |
D. |
20–30 |
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Hint |
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8. |
Find the value of x so that the median of {4, 9, 6, 4, 4, 10, 5, x, 8, 9} is 6.5. |
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A. |
8 |
B. |
6 |
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C. |
7 |
D. |
5 |
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Hint |
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9. |
Find the mean deviation of the data below. 36, 49, 65, 77, 70, 49, 40, 58, 76, 73, 58, 39 |
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A. |
11.854 |
B. |
10.631 |
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C. |
12.417 |
D. |
12.263 |
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Hint |
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10. |
From a population of 1,000 items, a sample of 750 is chosen and found to have a standard deviation of 33. Find the standard error of the mean. |
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A. |
1.04 |
B. |
1.2 |
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C. |
2.6 |
D. |
3.65 |
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Hint |
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