TS ICET 2015 Question Paper with Solutions for online practice

Question : 145 of 200

Marks: +1, -0

The standard deviation of 1,2,3 ......,25 is

Solution:

1, 2, 3, ..., 25
The given set of observations is an A.P. consisting of consecutive natural numbers.

∴S.D=d√{{n^2-1}/12}

Here, n = 25, common difference, d = 1

∴S.D

=1√{\;\;{(25)^{2}-1}/{12}}=√{52}=2√{13}

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