Chapter 4.4

Question 1

What is an Independent event?

Answer 1

an occurrence of one event that has no effect on the probability that the other event will occur; no change

e.g. pulling a card then RETURNING it and pullng another

pg. 217

Question 2

What is a Dependent event?

Answer 2

an occurrence of one event that has an effect on the probability of the other event; change

e.g. pulling a card and then another w/o returning the first

pg. 217

Question 3

What is the equation for multiple successes when the events A and B are independent?

Answer 3

P(A and B)=P(A)xP(B)

pg. 219

Question 4

What is Conditional Probability?

Answer 4

When the events are independent and you’re finding the probability that the event B will occur given that the event A has already occurred;
Equation:P(B|A)=P(B given A)

e.g. What is the P a card is a Queen, given that it’s a face? P(Q|F)

pg. 222

Question 5

What is the equation for multiple successes when the events A and B are dependent?

Answer 5

P(A and B)=P(A)xP(A|B)

pg. 224