Question

The monthly wages of 30 workers in a factory are given below:

83.0, 835, 890, 810, 835, 836, 869, 845, 898, 890, 820, 860, 832, 833, 855, 845, 804, 808, 812, 840, 885, 835, 836, 878, 840, 868, 890, 806, 840, 890.

Represent the data in the form of a frequency distribution with class size 10.

Answer 1

Here, the maximum and minimum values of the variate are 898 and 804 respectively.

So the range = 898 – 804 = 94

Here, we will take class size 10. So we must have 94/10 i.e. 10 classes each of size 10.

Therefore, the frequency distribution in which the lower limit is included and upper limit excluded is:

Lower limit of first class interval is;

And, upper limit of first class interval is:

Other class limits are: