Q3 of 96 Page 166

Calculate the mean of the following data

Since, given data is not continuous, so we subtract 0.5 from the lower limit and add 0.5 in the upper limit of each class.

Now, we first find the class mark x_iof each class and then proceed as follows

Therefore, mean

Hence, mean of the given data is 12.93.

Find the mean of the distribution

Calculate the mean of the scores of 20 students in a mathematics test

The following table gives the number of pages written by Sarika for completing her own book for 30 days.

Find the mean number of pages written per day.

The daily income of a sample of 50 employees are tabulated as follows.

Find the mean daily income of employees.