AP Stats Chapter 5

The two-way table gives summarizes information about seniors and juniors at a high school and the way they typically get to school.

Randomly select one student. What is the probability that he or she is a senior or walks to school?

• 40/250

• 40/88

• 40/550

• 338/550

The two-way table gives summarizes information about seniors and juniors at a high school and the way they typically get to school.

Randomly select one student. What is the probability that he or she is a senior, given that he or she walks to school?

• 40/250

• 40/88

• 40/550

• 88/250

The two-way table gives summarizes information about seniors and juniors at a high school and the way they typically get to school. Randomly select one student. Which one of the following is true about the events “Is a senior” and “walks to school”?

• These two events are mutually exclusive and independent.

• These two events are neither mutually exclusive nor independent.

• These two events are mutually exclusive, but we do not have enough information to determine if they are independent.

• These two events are mutually exclusive, but not independent.

When a polling organization randomly calls households for a survey, there is a 0.10 probability they are able to obtain a response. If the organization randomly calls 10 households, what is the probability they are able to obtain a response from at least 1 household?

• 0.0000

• 0.3487

• 0.5000

• 0.6513

Is this a probability distribution?

• No, the sum of p(x) does not equal 1.

• Yes, all p(x) are between 0 and 1.

• No, all p(x) are not between 0 and 1.

• Yes, the sum p(x) is 1.

Is this a probability distribution?

• No

• Yes

• A

• B

• C

• D

• E

The partially-complete table below shows the distribution of favorite sport to watch on TV for a sample of students. If a randomly chosen student’s favorite sport involves a ball, what is the probability the student’s favorite choice is football?

• 0.45

• 0.36

• 0.50

• 0.63

Suppose that a student is randomly selected. The probability that the student is a senior is 0.22. The probability that the student has a driver’s license is 0.30. If the probability that the student is a senior and has a driver’s license is 0.16, what’s the probability that the student isn’t a senior and doesn’t have a driver’s license?

• 0.06

• 0.14

• 0.64

• 0.70

Approximately 3.5 percent of all children born in a certain region are from multiple births (that is, twins, triplets, etc.). Of the children born in the region who are from multiple births, 22 percent are left-handed. Of the children born in the region who are from single births, 11 percent are left-handed. What is the probability that a randomly selected child born in the region is left-handed?

• 0.1062

• 0.965

• 0.1139

• 0.008