Question

Given below are the cumulative frequencies showing the weights of 685 students of a school. Prepare a frequency distribution table.

Weight (in kg)	No. of students
Below 25 Below 30 Below 35 Below 40 Below 45 Below 50 Below 55 Below 60 Below 65 Below 70	0 24 78 183 294 408 543 621 674 685

Answer 1

We make class intervals 0-25, 25-30, 30-35, 35-40, 40-45, 45-50, 50-55, 55-60, 60-65 and 65-70.

We will now find the frequencies of the different class-intervals from the cumulative frequency distribution table.

The frequency of the class 0-25 is 0.

The frequency of the class 25-30 is.

The frequency of the class 30-35 is.

The frequency of the class 35-40 is.

The frequency of the class 40-45 is.

The frequency of the class 45-50 is.

The frequency of the class 50-55 is.

The frequency of the class 55-60 is.

The frequency of the class 60-65 is.

The frequency of the class 65-70 is.

Here is the cumulative frequency distribution table.