Ch2: Frequency Distributions in Behavioral Statistics

These flashcards cover key concepts related to frequency distributions and data visualization methods in behavioral statistics.

Frequency Distribution

Describes the pattern of a set of numbers by displaying a count or proportion for each possible value of a variable.

Raw Score

A data point that has not yet been transformed or analyzed.

Frequency Table

A visual depiction of data that shows how often each value occurred.

Grouped Frequency Table

A visual depiction of data that reports frequencies within a given interval rather than for a specific value.

Histogram

A graph that depicts just one variable, with values of the variable on the x-axis and the frequencies on the y-axis.

Normal Distribution

A frequency distribution that is bell-shaped, symmetric, and unimodal.

Skewed Distribution

A distribution where one of the tails is pulled away from the center.

Floor Effect

A situation in which a constraint prevents a variable from taking values below a certain point.

Ceiling Effect

A situation in which a constraint prevents a variable from taking on values above a given number.

Dot Plot

A graph that displays each data point in a sample, with the range of scores along the x-axis.

Positively Skewed

tail to the right; may represent floor effects

Negatively Skewed

tail to the left; may represent ceiling effects