AP Statistics Unit 6

Find the area under the standard normal curve where z < 2.42 .

• .008

• .992

• .301

• .862

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees. Approximately what percent of the days in February would be between 24 and 30 degrees?

• 35.8%

• 68.2%

• 0%

• 50%

Lilah flips a coin. What is the chance the coin comes up with the first tails in fewer than 5 flips?

• geometcdf(1/2, 5)

• geometpdf(1/2, 5)

• geometcdf(1/2, 4)

• geometpdf(1/2, 4)

The probability that Jalen makes a free throw is 75%. What is the probability he makes his first free throw on his third attempt?

• geometcdf(3, 0.75)

• geometpdf(0.75, 3)

• geometpdf(3, 0.75)

• geometcdf(0.75, 3) 

If the probability that a house in your neighborhood has a dog is 60%, what is the chance that you find a house with a dog before the fifth house?

• 0.97

• 0.99

• 0.02

• 0.04

Which of the following is false about binomial probabilities?

• Their distributions are approximately symmetric.

• Trials must be fixed.

• Events musts be independent.

• The probability of success must be 0.50

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school. What is the probability that at least 2 of the first 10 blood donors has Type B blood? 

• 0.088

• 0.697

• 0.214

• 0.303 

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school.What is the probability that exactly 2 of the first 20 blood donors have Type B blood? 

• 0.316

• 0.282

• 0.001

• Not here

Mary is a good student. The overall probability that she studies is 0.80. The probability that she studies and that she passes her test is 0.60. What is the probability that she passes given that she studies?

• 0.75

• 0.25

• 0.20

• 0.60

What is the probability that they speak French given they are a girl? 

• 2.14

• .24

• .4

• .8571