Q. 6

The given table shows the age distribution of patients suffering from a disease in a city in a particular year. Find the mean age (in years) of the patients.


Answer :

Here first we’ll find the class marks -



We’ll first assume a mean A = 39.5 and here h = 19.5 - 9.5 = 10


Now we’ll find the ui



Now,


Where, = Mean, ui = calculated values of x and fi = frequency for that x.





= 34.875


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