Question

explain assumed mean method with an example

Answer 1

the assumed mean is used to compute the arithmetic mean and standard deviation for a grouped data. in other words by assuming the mean for the grouped data,the actual mean can be obtained easily. thus, the method of calculating the mean by assuming the mean is known as assumed mean method..

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Answer 2

Answer:

Step-by-step explanation:Let x1, x2, x3,…,xn are mid-points or class marks of n class intervals and f1, f2, f3, …, fn are the respective frequencies. The formula of the assumed mean method is:

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)/

Step-by-step explanation: