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: Identify the first n natural numbers
The first n natural numbers are:
\[ 1, 2, 3, \ldots, n \]

### Step 2: Calculate the Mean (\( \bar{x} \))
The mean is calculated using the formula:
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