Chapters 1-4

Question 1

Population

Answer 1

Defined collection or group of objects

Question 2

Census

Answer 2

Data is available for all objects in population

Question 3

Sample

Answer 3

Subset of population

Question 4

Variable

Answer 4

Any characteristic whose value may change from one object to another in the population

Question 5

Empirical Data

Answer 5

Based on observation

Question 6

Frequency

Answer 6

Number of times that a data value occurs in the data set

Question 7

Relative Frequency

Answer 7

A proportion of time that the value occurs

Question 8

Unimodal

Answer 8

1 peak

Question 9

Bimodal

Answer 9

2 peaks

Question 10

Multimodal

Answer 10

More than 2 peaks

Question 11

Symmetric

Answer 11

Mirror image

Question 12

Positively Skewed

Answer 12

Right stretched

Question 13

Negatively Skewed

Answer 13

Left Stretched

Question 14

Uniform

Answer 14

Straight

Question 15

Truncated

Answer 15

Limited

Question 16

Mode

Answer 16

Most frequent value that occurs in a data set

Question 17

Quartiles

Answer 17

Divides data into four equal parts

Question 18

Trimmed Means

Answer 18

Mean obtained form trimming off a% of the observations from “each” side of a data set

Question 19

Range

Answer 19

Difference between the largest and smallest values

Question 20

Standard Deviation

Answer 20

Square root of the average squared deviation from the mean

Question 21

Variance

Answer 21

Square of the standard deviation

Question 22

Event

Answer 22

Subset of outcomes contained in the sample space

Question 23

Simple Event

Answer 23

Consists of exactly one outcome

Question 24

Compound Event

Answer 24

Consists of more than one outcome

Question 25

Union

Answer 25

A or B

Question 26

Intersection

Answer 26

A and B

Question 27

Complement

Answer 27

A’

Question 28

Mutually Exclusive

Answer 28

No outcomes in common

Question 29

Permutation

Answer 29

An ordered arrangement of k distinct objects taken from a set of n distinct objects

Question 30

Combination

Answer 30

An unordered arrangement of k distinct objects taken from a set of n distinct objects

Question 31

Random Variable

Answer 31

A “rule” that assigns a number to each outcome in the sample space

Question 32

Discrete

Answer 32

Possible values either constitute a finite set or else an infinite sequence in which there is a first element, second element, etc.

Question 33

Continuous

Answer 33

Possible values consists of an entire interval on the number line

Question 34

Bernoulli RV

Answer 34

A random variable with two possible outcomes: 0 or 1

Question 35

Probability Distribution

Answer 35

A mathematical model that relates the value of a random variable with the probability of occurrence of that value in the population