Higher Study | Quantitative Aptitude | Elementary Statistics

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Questions

If the standard deviation of a population is 7, what would be the population variance?

The mean of a distribution is 20 and the standard deviation is 4. What is the value of the coefficient variation?

If the standard deviation of a population is 4.5, what would be the population variance?

If the standard deviation of a population is 6.5, what would be the population variance?

The mean of a distribution is 15 and the standard deviation is 5. What is the value of the coefficient variation?