Examlex
The first intelligence tests were designed to measure achievement,not aptitude.
Standard Deviation
A measure of the amount of variation or dispersion of a set of values, indicating how spread out the values are from the mean.
Mean
The arithmetic average of a set of values, calculated as the sum of all values divided by the total number of values.
Deviation
The amount by which a single measurement differs from a fixed value such as the mean or expected value.
Normal Curve
A symmetrical, bell-shaped curve representing the distribution of values, scores, or measurements where most occurrences take place near the average.
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