Examlex
An operating system is software that provides the basic instructions for starting up the computer and processing the basic input and output.
Median
The middle value in a data set, which divides it into two equal halves, with an equal number of values both above and below it.
Range
The difference between the highest and lowest scores in a data set, used as a measure of variability.
Stanine
A method of scaling test scores on a nine-point standard scale with a mean of five and a standard deviation of approximately two, used to simplify the interpretation of test results.
Normal Curve
A bell-shaped curve that represents the distribution of a set of data where most occurrences take place in the middle of the range.
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