Examlex
You cannot calculate and interpret differences between numbers assigned to ordinal data.
Standard Deviation
A statistical measure that quantifies the amount of variation or dispersion of a set of data values from the mean value.
Percentile Score
The percentage of people someone scores higher than on a scale or test; a score at the 90th percentile means someone scores higher than 90% of the people who took the scale.
Normal Distribution
A symmetrical bell-shaped distribution in which most of the data points cluster around the mean, with decreasing frequency toward the tails.
Mode
The value that appears most frequently in a given set of data, representing the most common outcome within that data set.
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