Find the mean,variance and standard deviation for the following data:(i) 2, 4, 5, 6, 8, 17

(ii) 6, 7, 10, 12,13, 4, 8, 12

Answer 1 :

Answer 2 :

The variance of 15observations is 4. If each observation is increased by 9, find the variance ofthe resulting observations.

Answer 3 :

The mean of 5observations is 4.4 and their variance is 8.24. If three of the observationsare 1, 2 and 6, find the other two observations.

Answer 4 :

Answer 5 :

∴ Themean of new observation is 24 and Standard deviation of new observation is 12.

Answer 6 :

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