Write the formula for the measure of dispersion suitable for an openended frequency distribution.
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Standard deviation (SD) is the most commonly used measure of dispersion. ... SD is the square root of sum of squared deviation from the mean divided by the number of observations. This formula is a definitional one and for calculations, an easier formula is used.
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Standard deviation (SD) is the most commonly used measure of dispersion. It is a measure of spread of data about the mean. SD is the square root of sum of squared deviation from the mean divided by the number of observations.
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