Question

Write the class size and class limits in each of the following:

(i) 104, 114, 124, 134, 144, 154 and 164

(ii) 47, 52, 57, 62, 67, 72, 77, 82, 87, 92, 97 and 102

(iii) 12.5, 17.5, 22.5, 27.5, 32.5, 37.5, 42.5, 47.5

Answer 1

(i) Here, the data is distributed uniformly. So the class size h is given by difference between any two consecutive data. So,

If a is the class mark of a class interval and h be the class size, then the lower and upper limits of the class interval are: respectively

Lower limit of first class interval is;

And, upper limit of first class interval is:

Other class limits are:

(ii) Here, the data is distributed uniformly. So the class size h is given by difference between any two consecutive data. So,

If a is the class mark of a class interval and h be the class size, then the lower and upper limits of the class interval are: respectively

Lower limit of first class interval is;

And, upper limit of first class interval is:

Other class limits are:

(iii) Here, the data is distributed uniformly. So the class size h is given by difference between any two consecutive data. So,

If a is the class mark of a class interval and h be the class size, then the lower and upper limits of the class interval are: respectively

Lower limit of first class interval is;

And, upper limit of first class interval is:

Other class limits are: