Introduction to Psychological Statistics

Branch of mathematics that deals with the organization, summarization, analysis, and interpretation of group of numbers.

A set of mathematical procedures for organizing, summarizing, and interpreting information

Set of all individuals of interest in a particular study

A value---usually a numerical value--- that describes a population (any measurement that describes a population)

It is a sub-set of a population

Set of individuals selected from a population, usually intended to represent the population in a research study

A value (usually a numerical value) that describes a sample

Average from the sample only

Characteristics or condition that changes or has different values for different individuals

Possible number or category that a score can have

A particular person's value on a variable (also known as the raw score)

(Plural) These are measurement or observations, multiple scores