Arihant Expert Team Solutions for Exercise 1: Exercise 1

The marks in Statistics of ten students of class are $90, 77, 63, 91, 89, 85, 95, 58, 68$ and $86$. Find the mean marks of these students.

Find the mean of following data.

Find the median of $10, 12, 9, 11, 13, 20, 22, 10, 8, 19.$

Find the mode of the following observations.

$8, 7, 6, 6, 5, 4, 12, 20, 6, 5, 6, 3, 3, 3, 6, 8, 6$

Mean of some numbers is $14.10$. If median of these numbers be $9.89$, find the mode.

Find the range of the observations given below:

$52, 47, 111, 33, 86, 97, 109, 39$.

Find the variance and standard deviation for the following data, $6, 7, 10, 12, 13, 4, 8, 12.$