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Operational Definition
A clear, detailed description that defines a measure to such a degree that everyone collects data the same way
Statistical significance
Proves independent variable caused dependent variable; measurement of likelihood that differences are due to an independent variable, and not by chance
P-value
Indicates that results are statistically significant, <0.5
Effect size
Measures the IV 's impact on the DV
Standard deviation
Measure of how spread out scores are from the mean
Z- score
Number of standard deviations above or below mean
Mean
The average score, found by adding all scores then dividing by number of scores
Median
Middle number of data set
Mode
Score that occurs the most
Correlation coefficient
Statistical measure to identify the relationship between two variables
Note 
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