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CBSE Notes 2011-2012 » XI-Maths

# Statistics-XI

## Find the standard deviation of the scores of 10 students. 65, 58, 67, 34, 48, 45, 70, 62, 60, 50.

Find the standard deviation of the scores of 10 students. 65, 58, 67, 34, 48, 45, 70, 62, 60, 50.

## The scores of 10 students in a test, out of maximum marks 50 are as follows : 28, 36, 34, 28, 48, 22...

The scores of 10 students in a test, out of maximum marks 50 are as follows :
28, 36, 34, 28, 48, 22, 35, 27, 19, 41. Find the variance.

## Find the mean and variance for the following data : (i) 6, 7, 10, 12, 13, 4, 8, 12 [NCERT] (ii) 2, 4...

Find the mean and variance for the following data :
(i) 6, 7, 10, 12, 13, 4, 8, 12 [NCERT] (ii) 2, 4, 5, 6, 8, 17

## For the frequency distribution standard deviation is 2 and arithmetic mean 15. Find the coefficient ...

For the frequency distribution standard deviation is 2 and arithmetic mean 15. Find the coefficient of variation.