UNIT 6: Probability

Question 1

Mutually Exclusive

Answer 1

Two or more events that cannot happen at the same time

Question 2

Exhaustive

Answer 2

Events that cover every outcome

Question 3

Absolute Risk

Answer 3

Absolute risk

Number of trials in which event happens / Total number of trials

Question 4

Relative Risk

Answer 4

Relative Risk for a group

Risk for those in group / Risk for those not in group

Question 5

General Addition Formula for probability

Answer 5

P(A∪B)=P(A)+P(B)−P(A∩B)

Question 6

Independent

Answer 6

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

Question 7

Multiplication Formula for independent events

Answer 7

P(A∩B)=P(A)×P(B)

Question 8

Conditional Probability

Answer 8

Two events are conditional if the outcome one effects the outcome of the other

Question 9

P(A|B)

Answer 9

The probability of A GIVEN THAT B has already happened

Question 10

Conditional Probability Formula

Answer 10

P(A│B) = P(A∩B) / P(B)

P(A│B)P(B) = P(A∩B) = P(B│A)P(A)

Question 11

Test for independence

Answer 11

A and B are independent if

P(A∩B)=P(A)P(B)