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The group of all individuals to which research applies is the
population

The group of all individuals to which research applies is the
sample

is anything that, when measured, can produce two or more different scores.
variable

occurs when, as the scores on one variable change, the scores on the other variable tend to change in a consistent fashion
relationship

is the extent to which one or close to one value of tends to be associated with only one value of
.
strength of relationship

are used to organize, summarize, and describe sample data, and to predict an individualâ€™s
score using the relationship with
.
descriptive statistic

are for deciding whether the sample data actually represent the relationship that occurs in the population.
inferential statistic

is a number that describes a characteristic of a sample of scores, symbolized using a letter from the English alphabet
statistic

is a number that describes a characteristic of a population of scores, symbolized using a letter from the Greek alphabet.
parameter

is the way in which the study is laid out
study design

