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2. What is the meaning of variance and standard deviation for data set? Solution Variance is the average of squared differences from the mean. It informally measures how far a set of (random) numbers are spread out from their mean. Standard deviation is the square root of the variance. It quantifies the amount of variation or dispersion of a set of data values..

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2. What is the meaning of variance and standard deviation for data set? Solution Variance is the average of squared differences from the mean. It informally measures how far a set of (random) numbers are spread out from their mean. Standard deviation is the square root of the variance. It quantifies the amount of variation or dispersion of a set of data values.

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  • 1. 2. What is the meaning of variance and standard deviation for data set? Solution Variance is the average of squared differences from the mean. It informally measures how far a set of (random) numbers are spread out from their mean. Standard deviation is the square root of the variance. It quantifies the amount of variation or dispersion of a set of data values.