need help to find class interval which is B, the rest is accurate please help me

Question

need help to find class interval which is B, the rest is accurate please help me understand it

1.

The following cumulative frequency polygon shows the selling price (5000) of houses sold in the Billings Montana, area. 200 150 100 50 100 75 50 25 0 50 100 150 200 250 300 350 Selling price ($000s) a. How many homes were studied? 200 Number of homes b. What is the class interval? lass interval c. One hundred homes sold for less than what amount? Sold price $ 190,000 approximately d. About 75% of the homes sold for less than what amount? Sold price $ 250,000 approximately e. Estimate the number of homes in the $150,000 up to $200,000 class. 50 Amount f. About how many homes sold for less than $225,000? Amount 150

Explanation / Answer

Result:

Class interval refers to the numerical width of any class in a particular data distribution.

The selling price( in $1000s) is grouped into classes, 0-50, 50-100, 100-150… etc.

So the class interval is 50 ( $1000s) or $50000.

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