TS ICET 2017 Question Paper with Solutions for online practice

Question : 145 of 200

Marks: +1, -0

The median and mode of 4 observations are 4 and 6 respectively. The sum of the squares of the observations is 48. The variance of this data is :

Solution:

Mean

={3\Median-\Mode}/2={3×4-6}/2=3

Variance

={Σx_i^2}/N-(\Mean)^2=48/4-(3)^2=12-9=3

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