Statistics Exam 1 Vocabulary

Question 1

Something that varies in a study.

Answer 1

Variable

Question 2

Two variables identified in a study.

Answer 2

Bivariate

Question 2

Many variables identified in a study.

Answer 2

Multivariate

Question 3

Type of statistics that describes a sample.

Answer 3

Descriptive Statistics

Question 4

Technique for generalizing from a sample to a population

Answer 4

Inferential Statistics

Question 5

When the researcher does not know who to survey.

Answer 5

Population Specification

Question 6

A listing of the individuals or objects to be sampled.

Answer 6

Sample Frame

Question 7

Technique that reasons from sample to the population.

Answer 7

Probability

Question 8

Interest is focused on a finite, identifiable, unchanging collection of individuals or objects that make up a population.

Answer 8

Enumerative Study

Question 9

A study that is not enumerative in nature and carried out with the objective of improving a future product. No sampling frame.

Answer 9

Analytic Study

Question 10

Sampling strategy that entails separating the population units into nonoverlapping groups and takes a sample from each one.

Answer 10

Stratified Sampling

Question 11

What is sample size denoted as?

Answer 11

n

Question 12

What are individual observations denoted by?

Answer 12

x1, x2, … xn

Question 13

A numerical value with a set of finite values or can be listed in an infinite sequence.

Answer 13

Discrete Value

Question 14

A numerical value with possible values that consist of an entire interval on the number line.

Answer 14

Continuous Value

Question 15

Number of times a value occurs in a data set.

Answer 15

Frequency

Question 16

The fraction or proportion of times a value occurs.

Answer 16

Relative Frequency

Question 17

A tabulation of the frequencies and / or relative frequencies.

Answer 17

Frequency Distribution

Question 18

A histogram that rises to a single peak, then declines.

Answer 18

Unimodal Histogram

Question 19

A histogram with two different peaks.

Answer 19

Bimodal Histogram

Question 20

A histogram skewed to the right.

Answer 20

Positively Skewed Histogram

Question 21

A histogram skewed to the left.

Answer 21

Negatively Skewed Histogram

Question 22

Arithmetic average of a set of numbers.

Answer 22

Mean

Question 23

The middle value in a sample.

Answer 23

Median

Question 24

A single number that is the best guess.

Answer 24

Point Estimate

Question 25

Divides data into 4 equal parts.

Answer 25

Quartiles

Question 26

The difference between largest and smallest sample values.

Answer 26

Range

Question 27

Set of all possible outcomes of an experiment.

Answer 27

Sample Space

Question 28

Any collection (subset) of outcomes contained in the sample space.

Answer 28

Event

Question 29

An event that consists of exactly one outcome.

Answer 29

Simple Event

Question 30

An event that consists of more than one outcome.

Answer 30

Compound Event

Question 31

An ordered subset.

Answer 31

Permutation

Question 32

An unordered subset.

Answer 32

Combination

Question 33

IF the first element or object of an ordered pair can be selected in n1 ways and for each of these ways the second element of the pair can be selected in n2 ways, then the number of pairs is n1n2.

Answer 33

The Product Rule for Ordered Pairs

Question 34

The probability of A given that B has occurred.

Answer 34

Conditional Probability