Answer:
See explanation
Step-by-step explanation:
The question says the diameters of 50 pillars were measured. However, only the measurements of 20 pillars were provided.
So, I will work with 20
Given
Solving (a): Frequency distribution table
Using the given intervals:
The table is as follows:
The class mark is the average of the class interval
For instance: The class mark of 61 - 70 is:
<em>This is applied to other intervals</em>
Solving (b): The histogram
<em>See attachment for histogram</em>
The frequency is plotted on the y-axis while the class interval, on the x-axis.