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Question 7
The runs scored by two teams A and B on the first 60 balls in a cricket match are given below:
Number of ballsTeam ATeam B162571216131882192491025304531365637426343481044954685560210
Represent the data of both the teams on the same graph by frequencpolygons.

 


Solution

It can be observed that the class intervals of the given data are not continuous. There is a gap of 1 in between them. Therefore, 12=0.5 has to be added to the upper class limits and 0.5 has to be subtracted from the lower class limits. Also,  class mark of each interval can be found by using the following formula.
Class mark=Upper class limit+Lower class limit2
Continuous data with class mark of each class interval can be represented as follows.
Numberof ballsClass markTeam ATeam B0.56.53.5256.512.59.51612.518.515.58218.524.521.591024.530.527.54530.536.533.55636.542.539.56342.548.545.510448.554.551.56854.560.557.5210
By taking class marks on x-axis and runs scored on y-axis, a frequency polygon canbe constructed as follows.

 

 

Mathematics

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