Chapter 5 - Probability

Question 1

What is an Experiment?

Answer 1

✯ An experiment is a repeatable process that gives rise to a number of outcomes.

Question 2

What is an Event?

Answer 2

✯ A collection of one or more outcomes.

Question 3

What assumptions are made when calculating probability in grouped data?

Answer 3

✯ Assumptions made are that the class width is uniformly distributed, when calculating estimated probability on grouped data.

Question 4

What are Sample Space diagrams used for?

Answer 4

✯ Sample Space diagrams can be drawn to calculate the probability of an outcome occurring,

Question 4

What is a Sample Space?

Answer 4

✯ A sample space is the set of all possible outcomes.

Question 5

Recall the formula for independent events.

Answer 5

✯ For independent events A, B , we have that P (A ∩ B) = P(A) x P(B)

Question 5

How do we know an event is independent?

Answer 5

✯ When one event has no effect on another, they are independent.

Question 5

How can we deduce that an event is mutually exclusive?

Answer 5

✯ When events have no outcomes in common, they are called mutually exclusive.

✯ When closed curves do not overlap on a Venn Diagram, we can deduce that they are mutually exclusive.

Question 6

Recall the formula for mutually exclusive events.

Answer 6

✯ For mutually exclusive events, A and B, we have that P (A ∩ B) = 0