Question

To calculate the mean of grouped data, Rahul used the assumed mean method. He used d = (x – А), where A is the assumed mean. Then `bar(x)` is equal to ______.

Options

• `A + bar(d)`

• `A + hbar(d)`

• `h(A + bard)`

• `A - hbar(d)`

Answer 1

To calculate mean of a grouped data, Rahul used assumed mean method. He used d = (x – А), where A is assumed mean. Then `bar(x)` is equal to `underlinebb(A + bar(d))`.

Explanation:

Given, d = x – A

x = d + A

The formula for the mean `(bar(x))` using the assumed mean method is

`bar(x) = A + bar(d)`