Calculate the mean deviation about the mean of the set of first `n` natural numbers when `n` is odd natural number.

Explanation

To calculate the mean deviation about the mean of the set of the first `n` natural numbers when `n` is an odd natural number, we can follow these steps:

### Step 1: Identify the set of first `n` natural numbers
The first `n` natural numbers are:
\[ 1, 2, 3, \ldots, n \]

### Step 2: Calculate the mean (\( \bar{x} \))
The mean of the first `n` natural numbers is given by the formula:
...