Statistics: Probability Rules

The likelihood of an event happening.

• probability

• sample space

• complement

• experimental probability

The probability of an event NOT happening.

• probability

• complement

• experimental probability

• sample space

If two events A and B are mutually exclusive, the probability that they both occur at the same time is

• 1

• 0

• 0.5

• impossible to determine

Is the table a valid probability model?

• Yes.

• No, all the probabilities are not 0-1 inclusive but the sum is equal to 1.0

• No, all the probabilities are 0-1 inclusive but the sum is more than 1.0

• No, all the probabilities are not 0-1 inclusive and the sum is more than 1.0

What is the Multiplication Rule?

• P(A) ⋅ P(B|A)

• P(A) - P(B)

• P(A) ⋅ P(B)

• P(A) + P(B) - P(A ∩ B)

Are getting a head and getting a tail when flipping a coin mutually exclusive events?

• No

• Yes

What is the Multiplication Rule?

• P(A) ⋅ P(B|A)

• P(A) - P(B)

• P(A) ⋅ P(B)

• P(A) + P(B) - P(A ∩ B)

What is the complementary rule of probability?

• P(A)

• P(A|B)

• P(A)

• P(A and B)

If two events are mutually exclusive, what is the probability of both events occurring?

• 0.25

• 0

• 1

• 0.5