AP Statistics Chapter 3

Find the value for

P( 1.36 < Z < 2.65)

• 0.0866

• 0.9175

• -0.0829

• 0.0829

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%

• 99.7%

• 95%

• 34%

A line up for tickets to a local concert had an average (mean) waiting time of 20 minutes with a standard deviation of 4 minutes. If 2000 ticket buyers were in line, how many of them would expect to wait for less than 16 minutes?

• 320

• 1550

• 100

• 30

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

• 100

• 25

• .5

• 1

What is the mean of the Normal Distribution?

What is the standard deviation of the Normal Distribution?

• A

• B

• C

• D

• E

Answer explanation

e. A correlation of near zero indicates no (or little) linear relationship, either positive or negative. Answers a, b and d indicate some form of linear relationship. Answer c may or may not be true depending on whether the

correlation is zero due to random scatter or due to a strong curved relationship. It is possible to have a zero correlation where there is a strong relationship, just not a linear one.

• A

• B

• C

• D

• E

Answer explanation

• A

• B

• C

• D

• E

Answer explanation

• A

• B

• C

• D

• E

Answer explanation