A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a students was absent.

Number of days :	0-6	6-12	12-18	18-24	24-30	30-36	36-42
Number of students:	10	11	7	4	4	3	1

Given:

A class teacher has the given absentee record of 40 students of a class for the whole term.

To do:

We have to find the mean number of days a student was absent.

Solution:

Mean $=\frac{\sum{f_ix_i}}{\sum{f_i}}$    

Therefore,  

Mean $=\frac{564}{40}$

$=\frac{141}{10}$

$=14.1$

The mean number of days a student was absent is 14.1 days. 

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

398 Views

Kickstart Your Career

Get certified by completing the course

Get Started