Prob Stats 3.1 - 3.3 Review

Find the probability that a randomly selected family is not taking a summer vacation this year.

• 28/45

• 45/146

• 17/45

• 31/146

Find the probability that a randomly selected family is taking a summer vacation this year, given that they own a computer.

• 87/115

• 101/146

• 87/146

• 87/101

Are the events “owning a computer” and “taking a summer vacation this year” independent or dependent events? Explain with math.

• Independent because owning a computer does not affect taking a summer vacation.

• Dependent because the probability of owning a computer given a summer vacation equals the probability of owning a computer.

• Dependent because 87/101 does not equal 101/146.

• Dependent because 87/101 does not equal 115/146.

Find the probability that a randomly selected worker has one month’s income or more set aside for emergencies.

• 149/287

• 138/287

• 142/287

• 62/138

Given that a randomly selected worker is a male, find the probability that the worker has less than one month’s income.

• 66/287

• 149/287

• 66/142

• 66/149

Find the probability that the student is female or not a nursing major.

• 5506/3964

• 2709/3964

• 2797/3964

• 3813/3964

Find the probability that the student is not female or is a nursing major.

• 2860/3964

• 3876/3964

• 2271/3964

• 2422/3964

Are the events “being male” and “being a nursing major” mutually exclusive? Explain.

• No because they cannot happen at the same time.

• Yes because they cannot happen at the same time.

• No because they can happen at the same time.

• Yes because they can happen at the same time.

Find the probability that the person is frequently or occasionally involved in charity work.

• 1314/2850

• 428/2850

• 428/886

• 2422/2850

Find the probability that the person is female or not involved in charity work at all.

• 741/2850

• 2914/2850

• 1378/2850

• 2173/2850