Question

please solve this problem fast​

Answer 1

Answer:

Step-by-step explanation:

Assumed mean formula

a = assumed mean

fi = frequency of ith class

di = xi – a = deviation of ith class

Σfi = n = Total number of observations

xi = class mark = (upper class limit + lower class limit)/2

The value for a will be taken one among xi’s with the assumption that the frequency of a class is centred at its mid-point, called its class mark.

Answer 2

Answer:

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