Question

Q.1:- Calculate the SD (Standard Deviation) from the following ungrouped data.
Scores: 38, 36,34,32,30

Answer 1

Answer:

We have studied mean deviation as a good measure of dispersion. But a major problem is that mean deviation ignores the signs of deviation, otherwise they would add up to zero. To overcome this limitation variance and standard deviation came into the picture. Unlike mean deviation, standard deviation and variance do not operate on this sort of assumption. Rather they make use of the squares of deviations.

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