What is assumed mean &how can we find it
Assumed mean is the value that is assumed as the mean of the data and further it helps to find the exact mean of that data. For assumed mean, central value or value having maximum frequency is preferred.
For example, we have to find the mean of the data:
421, 450,411,436, 444, 432, 424, 438
Let us assume the mean as 436.
Now, deviation of other values from the assumed mean are as
–15, 14, –25, 0, 8, –4, –12, 2
On adding these deviations we get the sum as –32.
Average of the 8 values from the assumed mean =
Correct mean = 436 – 4 = 432