Normal Distribution Quiz

What does the mean tell you about the data set

• It tells you how angry you are with someone
• It tells you the number which occurs the most
• It tells you the difference between the highest and lowest number in data set
• It gives you the average for  the data you are looking for

The mean life of a tire is 30,000 km. The standard deviation is 2000 km.

Then, 68% of all tires will have a life between ___________ km and __________ km.

•  28,000 km and 32,000 km.
• 24,000 km and 34,000 km.
• 26,000 km and 34,000 km.
• 27,000 km and 31,000 km.

What is the standard deviation for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 7.83
• 10.1
• 7.26
• 9

What shape is a normal distribution curve?

• Half curve
• Round curve
• Bell curve
• Square curve

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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 distribution of heights of adult American men is approximately Normal with mean 69 inches and standard deviation 2.5 inches. Between what heights do the middle 95% of men fall? 

• 66.5-71.5
• 64-74
• 61.5-76.5
• 65-73

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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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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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