Examlex
If a set of scores covers a range of 80 points,the grouped frequency table should use an interval width of 8 points.
Percentile
A statistical measure indicating the value below which a given percentage of observations in a group falls.
Standard Normal Curve
A symmetrical bell-shaped curve representing the distribution of a variable that has been standardized; it has a mean of 0 and a standard deviation of 1.
Area
A measure of the extent of a two-dimensional figure or shape in a plane, often measured in square units.
Z-score
A numerical indicator that shows how a specific value compares to the average of a set of values by measuring the number of standard deviations it is from the mean.
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