Statistics-XI

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, 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, 5, 6, 8, 17

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

Find the coefficient of variation for the following data :
12, 6, 7,3, 15, 10, 18, 5.

Find the mean deviation from the median for the data :
(i) 34, 66, 30, 38, 44, 50, 40, 60, 42, 51 (ii) 22, 24, 30, 27, 29, 31, 25, 28, 41, 42
(iii) 38, 70, 48, 34, 63, 42, 55, 44, 53, 47