17) Probability

Question 1

Define ‘mutually exclusive’ ?

Answer 1

Two events that cannot occur at the same time

Question 2

If events A and B are mutually exclusive, what is P(A and B) ?

Answer 2

P(A and B) = 0

Question 3

If events A and B are mutually exclusive, what is P( A or B ) ?

Answer 3

P (A) + P (B)

Question 5

Define ‘independent’ ?

Answer 5

Two events that do not affect each other

Question 6

Define ‘conditional probability’ ?

Answer 6

Two events that affect each other

Question 7

If events A and B are independent, what is P(A and B ) ?

Answer 7

P (A) x P (B)

Question 8

If A and B are independent, what is A’ and B’ ?

Answer 8

They are also independent

Question 9

What is P(A’) ?

Answer 9

1 - P(A)

Question 10

What is the sum of a probability distribution ?

Answer 10

1

Question 11

Draw a setup for a probability distribution ?

Answer 11

Question 12

What are the conditions for a binomial distribution ?

Answer 12

• The number of trials is fixed
• The outcome is either a ‘success’ or ‘failure’
• Trials are independent of each other
• The probability of success remains constant in each trial

Question 13

How do you write the binomial distribution ?

Answer 13

X ~ B(n, p)

Question 14

What is the equation for the binomial distribution ?

Answer 14