Following are the ages (in years) of 360 patients, getting medical treatment in a hospital:


Age (in years)



10-20



20-30



30-40



40-50



50-60



60-70



Number of patients



90



50



60



80



50



30



Construct the cumulative frequency table for the above data.

The Cumulative frequency table can be drawn as given below:


Age (in year)



No. of patients



Cumulative frequency



10 – 20



90



90



20 – 30



50



140



30 – 40



60



200



40 – 50



80



280



50 – 60



50



330



60 – 70



30



360



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