State an advantage and a disadvantage of using the range instead of the variance

Question

State an advantage and a disadvantage of using the range instead of the variance as a measure of dispersion in sample data. Choose the correct answer below. The range is easier to calculate, but it is too affected by extreme values in the data set. The range uses all the values in the data set, but it is resistant unlike the variance. The range is more reliable, but the formula is more complicated than the one for the variance. The range has the same units as the original data, but it requires all the data values in the sample, unlike the variance.

Explanation / Answer

One of the disadvantage of using range as a method of dispersion as range is affected by outliers present in the data set. The range is defined as the difference between the highest and lowest observation. the prime advantage of dispersion is it is easy to calculate.

So, option A is correct.

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