Percents Normal Distribution

Sigma of P-Hat

• Population Standard Deviation

• Standard Deviation of the Sampling Distribution of Sample Means

• Sample Percents of the Standard Deviation

• Standard Deviation of the Sampling Distribution of Sample Proportions

A test has a mean of 40 and a standard deviation of 10. What is the percent of people that scored between 32 and 43?

• 62.13%

• 40.61%

• 13.65%

• 100%

Where can we locate the mean in the normal curve?

• to the left portion

• to the right portion

• at the center

• on the z - axis

Find the area under the normal distribution curve that represents the area to the left of:

z = -2.37

• 0.0089

• 0.9910

• 0.1401

• 0.1381

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

• 5%

• 95%

• 2.5%

• 50%

SAT scores in New York are approximately Normally distributed with a mean of 1050 and a standard deviation of 55.

About 2.5% of all test scores are less than what score?

• 942

• 1050

• 885

• 992

SAT scores in New York are approximately Normally distributed with a mean of 1050 and a standard deviation of 55. About 2.5% of all test scores are less than what score?

• 940

• 1050

• 885

• 995

• A

• B

• C

• D

• E

Give the percent in the section with the QUESTION MARK.

• 13.5 %

• 34 %

• 2.35 %

• 10%

According to the normal distribution, what percent of the population has an IQ between 70 -115

• 68%

• 81.5%

• 95%

• 47%