Chapter 6 Review

Front

What is the total area under the standard normal distribution curve?

Back

1

Front

What is the mean (μ) and standard deviation (σ) of the normal distribution for IQ scores?

Back

μ = 100, σ = 15

Front

What IQ score qualifies one to be a member of Mensa (top 2%)?

Back

130.75

Front

What is the average waist size for teenage males?

Back

29 inches

Front

What is the standard deviation of waist sizes for teenage males?

Back

1.4 inches

Front

Estimate the proportion of teenagers with waist sizes greater than 31 inches if the average waist size is 29 inches with a standard deviation of 1.4 inches.

Back

7.6%

Front

What is the mean height of men aged 20-29 in the United States?

Back

69.6 inches

Front

What is the standard deviation of height for men aged 20-29 in the United States?

Back

3.0 inches

Front

Find the height that defines the 78th percentile for men aged 20-29 with a mean height of 69.6 inches and a standard deviation of 3.0 inches.

Back

71.91 inches

Front

What is the mean number of accidents per week at a company?

Back

6.4