Practice Quiz #5 - Normal Distribution (Math 1)

A test has a mean of 40 and a standard deviation of 10. What is the percent of people that scored between 30 and 40?

• 68%

• 34%

• 13.6%

• 100%

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The mean GPA of students in a course at UCDavis is 3.2 with a standard deviation of 0.3. What percent of students in the course have a GPA between  2.9 and 3.8? 

• 81.5%
• 47.5%
• 68%
• 95%

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Between what two standard deviations of a normal distribution contain 68% of the data?

• one below and one above
• two below and two above
• two below and zero
• zero and two above

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The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of the products last between 12 and 15 days?

• 68%
• 34%
• 16%
• 2.5%

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The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of the products last 6 days or less?

• 68%
• 34%
• 16%
• 2.5%

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The distribution of heights of adult American men is approximately Normal with mean 69 inches and standard deviation 2.5 inches. What percent of men are between 64 and 66.5 inches tall? 

• 50%
• 2.5%
• 13.5%
• 34%

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68% of fireman worked between what years?

• Between 5 and 15 years
• Between 10 and 30 Years
• Between 15 and 25 years
• Between 17 and 23 years

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Approximately 95% of women had their first child between the ages of:

• 11.1 and 43.5 years
• 16.5 and 38.1 years
• 21.9 and 32.7 years
• 21.9 and 38.1 years

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The distribution of heights of adult American men is approximately Normal with mean 69 inches and standard deviation 2.5 inches.  
What percent of men are taller than 74 inches?

• 2.5%
• 5%
• 16%
• 1%

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The speeds of cars on the highway have a mean of 95 km/h with a standard deviation of 5 km/h. What percentage of cars averaged less than 85 km/h?

• .15%

• 2.35%

• 2.5%

• 18.5%

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