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1
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In a New York City high school, a survey revealed the mean amount of cola
consumed each week was 12 bottles and the standard deviation was 2.8 bottles. Assuming the
survey represents a normal distribution, how many bottles of cola per week will approximately 68.2%
of the students drink?
a) | 6.4 to 12 | c) | 9.2 to 14.8 | b) | 6.4 to 17.6 | d) | 12 to 20.4 |
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2
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The amount of juice dispensed from a machine is normally distributed with a mean
of 10.50 ounces and a standard deviation of 0.75 ounce. Which interval represents the amount of
juice dispensed about 68.2% of the time?
a) | 9.00–12.00 | c) | 9.75–11.25 | b) | 9.75–10.50 | d) | 10.50–11.25 |
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3
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On a standardized test, the mean is 76 and the standard deviation is 4.
Between which two scores will approximately 68% of the scores fall?
a) | 68 and 84 | c) | 74 and 78 | b) | 72 and 80 | d) | 76 and 80 |
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4
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In a certain high school, a survey revealed the mean amount of bottled water
consumed by students each day was 153 bottles with a standard deviation of 22 bottles. Assuming
the survey represented a normal distribution, what is the range of the number of bottled waters that
approximately 68.2% of the students drink?
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5
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The mean of a normally distributed set of data is 56, and the standard deviation
is 5. In which interval do approximately 95.4% of all cases lie?
a) | 46–56 | c) | 51–61 | b) | 46–66 | d) | 56–71 |
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6
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The heights of the girls in the eleventh grade are normally distributed with a
mean of 66 inches and a standard deviation of 2.5 inches. In which interval do approximately
95% of the heights fall?
a) |  inches | c) | 
inches | b) |  inches | d) | 
inches |
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7
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The mean of a normally distributed set of data is 52 and the standard deviation
is 4. Approximately 95% of all the cases will lie between which measures?
a) | 44 and 52 | c) | 48 and 56 | b) | 44 and 60 | d) | 52 and 64 |
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8
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On a standardized test with a normal distribution of scores, the mean score is
82 and the standard deviation is 6. Which interval contains 95% of the scores?
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9
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A standardized test with a normal distribution of scores has a mean score of 43
and a standard deviation of 6.3. Which range would contain the score of a student in the 90th
percentile?
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10
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On a standardized test with a normal distribution, the mean is 20 and the
standard deviation is 2.6. In which interval would the greatest number of scores occur?
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