Q1 of 71 Page 204

Calculate the mean of the following distribution by assumed mean method:

We’ll first assume a mean A(the one with highest frequency) = 900 and here h = 820 - 800 = 20.

Now we’ll find the ui,




Now,


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





⇒ = 891.2


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