Find the mean deviation from the mean for the following data: Classes 0-100 100-200 200-300 300-400 400-500 500-600 600-700 700-800 Frequencies 4 8 9 10 7 5 4 3

Explanation

To find the mean deviation from the mean for the given data, we will follow these steps:

### Step 1: Calculate the midpoints (xi) of each class
The midpoints of the classes are calculated as follows:

- For the class 0-100, midpoint \( x_1 = \frac{0 + 100}{2} = 50 \)
- For the class 100-200, midpoint \( x_2 = \frac{100 + 200}{2} = 150 \)
- For the class 200-300, midpoint \( x_3 = \frac{200 + 300}{2} = 250 \)
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