Probability

Question 0

Sample space

Answer 0

Collection of ALL outcomes

Question 1

Experiment

Answer 1

Process of obtaining an observation

Question 2

Events

Answer 2

Collection of outcomes from AN experiment

Question 3

Simple event

Answer 3

Event with one outcome

Question 4

Compound event

Answer 4

An event with 2 or more simple events

Question 5

Rounding off probabilities

Answer 5

3sf

Question 6

3 approaches to probabilities

Answer 6

1. Classical
2. Empirical
3. Subjective

Question 7

Mutually exclusive events

Answer 7

No events can occur when one occurs

Question 8

Independent event

Answer 8

One event does not affect the other (not mutually exclusive)

Question 9

Collectively exhaustive events

Answer 9

At least one event must occur

Question 10

Classical probability

Answer 10

Based in equally likely outcomes

Question 11

Empirical probabilities

Answer 11

Based in relative frequencies

Question 12

What is the approach for classical and empirical probabilities?

Answer 12

Objective

Question 13

Subjective probability

Answer 13

Based on available info

Question 14

Special rule of addition

Answer 14

If 2 events are mutually exclusive:

P(A or B) = P(A) + P(B)

Question 15

General rule of addition

Answer 15

If two events are not mutually exclusive:

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

Question 16

Complement rule

Answer 16

A + not A = 1

Question 17

Joint probability

Answer 17

2 or more events happen concurrently

Question 18

Special rule of multiplication

Answer 18

When 2 events are independent:

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

Question 19

Conditional probability

Answer 19

While an event is occurring, another event has occurred.

P(A|B)

Question 20

General rule of multiplication

Answer 20

When 2 events are NOT independent,

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