Question

Assume method of finding mean is

Answer 1

Step-by-step explanation:

statistics, the assumed mean method is used to calculate mean or arithmetic mean of a grouped data

This method depends on estimating the mean and rounding to an easy value to calculate with. Again this value is subtracted from all the sample values. When the samples are converted into equal size ranges or class intervals, a central class is chosen and the computations are performed.

• formula
• 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
• Here,
• 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