Statistical Evaluation Flashcards
Statistics
The branch of mathematics concerned with summarizing and making meaningful inferences from collections of data.
Descriptive statistics
The listing and summarizing of data in a practical, efficient way.
Frequency distribution
An arrangement of data that indicates how often a particular score or observation occurs.
Normal curve
A graph of frequency distribution shaped like a symmetrical, bell-shaped curve; a graph of normally distributed data.
Central tendency
A number that describes something about the “average” score of a distribution.
Variability
A measure of difference, or spread of data.
Standard deviation
A measure of variability that describes an average distance of every score from the mean.
Correlation coefficient
Describes the direction and strength of the relationship between two sets of variables.
Inferential statistics
Numerical methods used to determine whether research data support a hypothesis or whether results were due to chance.