20. The cumulative frequency and the cumulative relative frequency polygon for a dis- tribution of selling prices ($000) of houses sold in the Billings, Montana, area is shown in the graph. 200 100...

1. How many homes were studied?

2. What is the class interval?

3. One hundred homes sold for less than what amount?

4. About 75% of the homes sold for less than what amount?

5. Estimate the number of homes in the $150,000 up to $200,000 class.

6. About how many homes sold for less than $225,000?

Extracted text: 20. The cumulative frequency and the cumulative relative frequency polygon for a dis- tribution of selling prices ($000) of houses sold in the Billings, Montana, area is shown in the graph. 200 100 150 75 100 50 50 25 50 100 150 200 250 300 350 Selling Price ($000) Frequency Percent