Statistics - Chapter 4 Test Review

Front

What is the probability of an event occurring if the probability of it not occurring is 0.4?

Back

0.6

Front

If Kyleigh saw 10 blue, 8 red, and 42 white cars, how do you calculate the experimental probability of not seeing a white car?

Back

P(not white) = (10 + 8) / (10 + 8 + 42) = 18/60 = 0.3

Front

What is the formula to determine P(shaded number or number less than five)?

Back

P(shaded) + P(less than 5) - P(both) = 4/8 + 4/8 - 2/8

Front

How do you calculate the probability of selecting two keys that do not open the door from a key ring with 12 keys, 3 of which open the door?

Back

P(neither key opens) = (9/12) * (8/11) = 6/11

Front

What is the probability of a spinner landing on an odd number if there are 4 odd numbers out of 8 total?

Back

P(odd) = 4/8 = 0.5

Front

Define experimental probability.

Back

Experimental probability is the ratio of the number of times an event occurs to the total number of trials or observations.

Front

What is the complement of an event in probability?

Back

The complement of an event A is the event that A does not occur, denoted as A'. The probability of A' is 1 - P(A).

Front

How do you find the probability of two independent events both occurring?

Back

P(A and B) = P(A) * P(B) for independent events A and B.

Front

What is the difference between theoretical probability and experimental probability?

Back

Theoretical probability is based on the expected outcomes in a perfect scenario, while experimental probability is based on actual experiments.

Front

What does it mean for events to be mutually exclusive?

Back

Mutually exclusive events cannot occur at the same time; the occurrence of one event excludes the possibility of the other.