Examlex
In this type of study design,a particular individual,program,or event is studied in depth over a defined period of time.
Standard Deviation
An indicator of the spread or variability within a data set; where a small standard deviation indicates values closely clustered around the average, and a large standard deviation suggests they are widely scattered.
Z-score
A statistical measure that describes a value's position relative to the mean of a group of values, expressed in units of standard deviation.
Z
In statistics, often represents the standard score, which is the number of standard deviations a data point is from the mean.
Percentage
A way of expressing a number as a fraction of 100, used to compare proportions.
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