AP Stats Ch5 Test MC Section

Front

When are two events considered independent?

Back

When P(A|B) = P(A) and P(B|A) = P(B)

Front

What must an assignment of probability obey?

Back

The probability of any event must be a number between 0 and 1, inclusive; The sum of all the probabilities of all outcomes in the sample space must be exactly 1; The probability of an event is the sum of the outcomes in the sample space which make up the event.

Front

What is the probability of selecting at least one left-handed person from 3 randomly selected people if the probability of being left-handed is 1/7?

Back

0.37

Front

If a household has a dog, what is the probability they also have a cat given that 22% own a cat, 16% own a dog, and 12% own both?

Back

0.75

Front

What is the probability that both students chosen from a class of 18 girls and 14 boys are of the same gender?

Back

0.49

Front

Define independent events in probability.

Back

Two events are independent if the occurrence of one does not affect the occurrence of the other.

Front

What is the range of probabilities for any event?

Back

The probability of any event must be between 0 and 1, inclusive.

Front

What is the sum of probabilities of all outcomes in a sample space?

Back

The sum must be exactly 1.

Front

How do you calculate the probability of at least one event occurring?

Back

P(at least one) = 1 - P(none).

Front

What is conditional probability?

Back

The probability of an event given that another event has occurred, denoted as P(A|B).