Terms for chp. 4-5

# Terms for chp. 4-5 - Chapter IV Terms Range- the simplest...

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Chapter IV Terms Range- the simplest measure of dispersion; the distance between the largest and smallest scores. Semi-interquartile range- is one-half the distance between the first quartile point, and the third quartile point. Percentile point- is a point on the measurement scale below which a specified percentage of scores falls. Percentile rank- refers to the percentage of scores that falls below the percentile point. Standard deviation- is the most important and most widely used measure of dispersion. A number that is based on every score in a distribution and represents the square root of the mean squared distance of scores form the mean. Deviation formula- the formula for S because the formula involves the computation of deviations. Raw-score formula- similar to the deviation formula but it eliminates the rounding error. Coefficient of variation- is used when you want to compare the dispersions of two distributions with markedly different means.

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## This note was uploaded on 04/13/2008 for the course PSY 2405 taught by Professor Kirk during the Spring '08 term at Baylor.

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Terms for chp. 4-5 - Chapter IV Terms Range- the simplest...

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