Stats Final Review - Probability

Front

What is the complement of an event in probability?

Back

The complement of an event is the set of outcomes in which the event does not occur.

Front

If the probability of an event occurring is 30%, what is the probability of it not occurring?

Back

70%.

Front

What does a probability of 42% indicate about an event?

Back

It indicates that the event is expected to occur 42 times out of 100 trials.

Front

How do you calculate the probability of multiple independent events all occurring?

Back

Multiply the probabilities of each individual event.

Front

What is the probability of rolling a 3 on a standard six-sided die?

Back

1/6 or approximately 16.67%.

Front

If 65% of males drive sports cars, what is the probability that a randomly selected male drives a sports car?

Back

65%.

Front

What is the definition of conditional probability?

Back

Conditional probability is the probability of an event occurring given that another event has already occurred.

Front

What is the formula for calculating the probability of the complement of an event?

Back

P(not A) = 1 - P(A).

Front

If it rains 90% of the time when forecasted, what does this imply about the reliability of the forecast?

Back

It implies that the forecast is quite reliable.

Front

What is the probability of selecting a student who does not carry their lunch in a bag if 42% do?

Back

58%.