Rachael and Peter arc discussing how the mean value and variance affect the dist

Question

Rachael and Peter arc discussing how the mean value and variance affect the distribution graph. As the following graph shows, there are two distributions: A and B Peter said that the distribution A has fatter tail because its has bigger standard deviation than the distribution B. Rachael's answer is different: she thinks the distribution A has a smaller standard deviation than the distribution B. Who do you think is right? Peter Rachael None of them are right. Distribution A and Distribution B have the same standard deviation

Explanation / Answer

Here range for distribution A is 20 to 50 and for distribution B is 20to 80. So standard deviation of distribution A is smaller than standard deviation of distribution B.

Ans: b) Rachael

Her approach is right

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