NDA 2025 Mathematics question
Consider the following statements : I. Mean and variance have the same unit of measurement. II. Mean deviation and standard deviation have the same unit of measurement. Which of the statements given above is/are correct?
Answer: (B)
Solution
The mean has the same unit as the observations, while the variance, being the mean of squared deviations, has the square of that unit; so Statement I is incorrect. The mean
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