Sangeetha Pulapaka
1

Step 1: Arrange the given un grouped data in ascending order

This already exists in an ascending order

Step 2: Calculate the sum of the given data by adding the numbers

3 + 3 + 4 + 4 + 4+ 4+ 5+ 6 + 6+ 6+ 6+ 6+ 6+ 6 + 7 + 7+ 7+ 7+ 7+ 7 + 16 + 17 + 22 + 22 + 25 = 213

Step 3: Divide this by the total number

There are 25 people so dividing \frac{213}{25} = 8.52 . This is the mean.