Section 2-3

Question 1

Descriptive statistics

Answer 1

The listing and summarizing of data in a practical, efficient way

Question 2

Frequency distribution

Answer 2

An arraignment of data that indicates how often a particular score or observation occurs

Question 3

Normal curve

Answer 3

A graph of frequency distribution shaped like a symmetrical, bell-shaped curve; a graph of normally distributed data

Question 4

Central tendency

Answer 4

A number that describes something about the “average” score of a distribution

Question 5

Variability

Answer 5

A measure of difference, or spread of data

Question 6

Standard deviation

Answer 6

A measure of variability that describes and average distance of every score from the mean

Question 7

Correlation coefficient

Answer 7

Describes the direction and strength of the relationship between two sets of variables

Question 8

Inferential statistics

Answer 8

Numerical methods used to determine whether research data support a hypothesis or whether results were to to chance

Question 9

Statistics

Answer 9

The branch of mathematics concerned with summarizing and making meaningful inferences from collections of data