METHODS OF DATA ANALYSIS
MEASURES OF DISPERSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is standard deviation?
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used to estimate the percentage of values within a few standard deviations of the mean
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the ratio of the standard deviation to the mean as a percentage
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a measure of how much might be expected of a typical member of the data set to differ from the mean
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the square of the standard deviation
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Explanation:
Detailed explanation-1: -The mean, , of a discrete probability function is the expected value. The standard deviation, , of the PDF is the square root of the variance. When all outcomes in the probability distribution are equally likely, these formulas coincide with the mean and standard deviation of the set of possible outcomes.
Detailed explanation-2: -Standard deviation is the square root of the variance. Standard deviation is a measure of how spread out the data is from its mean.
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