Normal Distribution Practice with Percents

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%

The average weight of a newborn is 7.5 pounds, with a standard deviation of 1.25 pounds. Birth weight follows the standard normal curve. What percent of newborns weigh 5 pounds or less at birth?

• 2.35%

• 0.15%

• 2.5%

• 50%

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%

What percentage of the data is between 0 and -1 standard deviations

• 34%

• 50%

• 2.35%

• 13.5%

This data is normally distributed. What percent of the data is in the shaded region?

• 68%

• 32%

• 16%

• 50%

What percent of people are 2 standard deviations or more above the mean?

• 2.35

• 34

• 68

• 2.5

This data is normally distributed. What percent of the data is in the shaded regions?

• 5%

• 95%

• 2.5%

• 50%

• A

• B

• C

• D

• E

This data is normally distributed. Approximately, what percent of the data is in the shaded region?

• 68%

• 32%

• 16%

• 50%

Give the percent in the section with the QUESTION MARK.

• 13.5 %

• 34 %

• 2.35 %

• 10%