Percents Normal Distribution

What is the standard deviation of this distribution? (how far is it from the mean to the first stdev line?)

• 60

• 1010

• 20

• 40

In a survey of men in the United States (ages 20-29), the mean height was 69.6 inches with a standard deviation of 3.0 inches. Find the minimum height in the top 17.5%.

• 69.98 in

• 71.18 in

• 72.40 in

• 73.01 in

Given that the total area shaded is 0.05, what is the positive z score associated with the drawing? Round to 2 decimals.

50% of the females are above what height?

• 5'3"

• 5'8"

• 5'9.5"

• 5'11"

The data is _____ standard deviation(s) from the mean.

• 2

• 1

• 3

Given a mean of 75 and a standard deviation of 7, what percentage of scores are between 75 and 82?

• 68%

• 81.5%

• 16%

• 34%

Find the area under the standard normal curve to the right of:

z = -2.67.

• 0.0869

• 0.9962

• 0.0008

• 0.1234

Find the area under the normal distribution curve between:

z = -1.53 and z = 0.

• 0.437

• 0.563

• 0.500

• 0.063

The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5.  What proportion of weeks would you expect to have more than 7 accidents?

• 0.3446

• 0.2856

• 0.4

• 0.6554

Test has a mean of 40 and a standard deviation of 10. What is the percent of people that scored above 62?

• 1.39%

• 45.34%

• 98.41%

• 22.34%