Chapter 12- Probability (statistics)

Question 1

what’s the formula for p(event) = ?

Answer 1

the formula for p(event) = Number outcomes where event happens / total number of outcomes

Question 2

the formula for p ( A or B ) = p ( A) + p (B) - p(A and B) is found on the data sheet. what do the symbols stand for?

Answer 2

p ( A or B ) = p ( A) + p (B) - p(A and B)

Question 3

what does the probability of p (A or B) = ?

Answer 3

p ( A or B) = p (A) + p (B)

Question 4

what are mutually exclusive events?

Answer 4

mutually exclusive events CAN’T happen t the same time.

p ( A n B) = 0

Question 5

what are independent events?

Answer 5

if the probability of a doesn’t depend on the probability of B happening then they’re independent.

p(A) X p(B) = p (A n B)

Question 6

p(A/B) = ?

Answer 6

p(A/B) = p (AnB) / p(B)

Question 7

what does p(A’) look like?

Answer 7

p(A’) looks like…

Question 8

what does p(AnB) look like?

Answer 8

Question 9

what does p(A’ n B) look like?

Answer 9