Find the mean deviation about the mean for the data : `4, 7, 8, 9, 10 , 12 , 13 , 17`

Explanation

To find the mean deviation about the mean for the data set \(4, 7, 8, 9, 10, 12, 13, 17\), we will follow these steps:

### Step 1: Calculate the Mean
The mean is calculated using the formula:
\[ \text{Mean} = \frac{\text{Sum of all data}}{\text{Number of data points}} \]
First, we find the sum of the data:
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