Range and Standard Deviation MCQs with Answers

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The Interquartile Range (IQR) is defined as $Q_3 - Q_1$, the difference between the third and first quartiles.

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The standard deviation of a binomial distribution is $\sqrt{npq}$, where $n$ is the number of trials, $p$ is the probability of success, and $q = 1 - p$.

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The normal distribution is less spread out when the standard deviation is small.

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The coefficient of variation (CV) is the ratio of Standard deviation and Mean, expressed as $CV = \frac{\sigma}{\mu} \times 100\%$.

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The difference between the largest and smallest value in a data set is called the Range.

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The range is the difference between the maximum value $28$ and the minimum value $20$, which is $8$.

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The standard deviation of identical values is always $0$ because there is no spread or variation among the data points.

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The variance of a constant is always $0$ because there is no deviation from the mean.