Find the mean and variance for each of the data : First n natural numbers

Explanation

To find the mean and variance of the first n natural numbers, we will follow these steps:

### Step 1: Calculate the Mean

1. **Sum of the first n natural numbers**:
The formula for the sum of the first n natural numbers is given by:
\[
S_n = \frac{n(n + 1)}{2}
...