The following table gives the distribution of IQ’s (intelligence quotients) of 60 pupils of class V in a school.


IQ’s



125.5


To


132.5



118.5


To


125.5



111.5


To


118.5



104.5


To


111.5



97.5


To


104.5



90.5


To


97.5



83.5


To


90.5



76.5


To 83.5



69.5


To 76.5



62.5


To


69.5



No. of pupils



1



3



4



6



10



12



15



5



3



1



Draw a frequency polygon for the above data.


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