Normal Curve

Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. Draw a normal curve on a separate piece of paper to help. *What test score is one standard deviation below the mean?*

• 66

• 86

• 56

• 96

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CCSS.HSS.ID.A.4

Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. Draw a normal curve on a separate piece of paper to help. *What test score is two standard deviation above the mean?*

• 66

• 86

• 56

• 96

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CCSS.HSS.ID.A.4

Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. What percent of test scores are two standard deviations above the mean?*

• 34%

• 13.5%

• 2.5%

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CCSS.HSS.ID.A.4

Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. *In a group of 230 tests, how many students score above 96?* Round to the nearest whole number.

• 6

• 5

• 78

• 31

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CCSS.HSS.ID.A.4

Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. *In a group of 230 tests, how many students score below 66?* Round to the nearest whole number.

• 37

• 36

• 78

• 31

Tags

CCSS.HSS.ID.A.4

Scores on an exam are normally distributed with a mean of 76 and a standard deviation of 10. *In a group of 230 tests, how many students score between 66 and 86?* Round to the nearest whole number.

• 156

• 157

• 62

• 218

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CCSS.HSS.ID.A.4

The number of nails of a given length is normally distributed with a mean length of 5.00 inches and a standard deviation of 0.03 inches. What is the length of a nail that is two standard deviations below the mean? Round to two places after the decimal (hundredths).

• 4.97

• 4.94

• 5.03

• 5.06

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CCSS.HSS.ID.A.4

The number of nails of a given length is normally distributed with a mean length of 5.00 inches and a standard deviation of .0.03 inches. What percent of nails in a bag that are less than 4.94?

• 34%

• 13.5%

• 2.5%

Tags

CCSS.HSS.ID.A.4

The number of nails of a given length is normally distributed with a mean length of 5.00 inches and a standard deviation of .0.03 inches. Find the number of nails in a bag of 120 that are less than 4.94 inches long.

• 3

• 16

• 40

• 15

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CCSS.HSS.ID.A.4

The actual weight of bags of mixed vegetables is normally distributed with a mean weight of 16.0 oz and a standard deviation of 0.1 oz. What percent of mixed vegetables is between 15.8 and 15.9?

• 34%

• 13.5%

• 2.5%

Tags

CCSS.HSS.ID.A.4