Construct a frequency distribution with a suitable number of classes given the following dataset: 138, 145, 172, 125, 145, 146, 147, 153, 168, 150, 142, 119, 157, 158, 147, 152, 122, 138, 144, 156, 16

Here's the solution for question 8.

Question 8(a): Construct a frequency distribution with suitable number of classes.

Step 1: Find the minimum and maximum values in the data.
The given weights are:
138, 145, 172, 125, 145, 146, 147, 153
168, 150, 142, 119, 157, 158, 147, 152
122, 138, 144, 156, 165, 173, 136, 1