NDA 2021 Mathematics question
When the measure of central tendency is available in the form of mean, which one of the following is the most reliable and accurate measure of variability?
Answer: (C)
Solution
Standard deviation is computed from the deviations of all observations from the mean, is rigidly defined, is suitable for further algebraic treatment and is least affected by sampling fluctuations. Therefore, when the mean is used as the measure of central tendency, standard
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