Commutative Frequency Curve – Statistics

Commutative frequency curve is a graph drawn with commutative frequency against the upper limit of class interval. The points are joined by a smooth curve and the curve is joined to the lower limit of the first class interval.

Example:

Draw given (cumulative frequency curve) for the data given below:

Class intervalfrequency
1000 – 110052
1100 – 120035
1200 – 130025
1300 – 140014
1400 – 150041
1500 – 160033

Solution:

Class intervalfrequencyCumulative frequency
1000 – 11005252
1100 – 12003587
1200 – 130025112
1300 – 140014126
1400 – 150041167
1500 – 160033200

Statistics[Class 9]