[Solved] The following distribution shows the prices of books at a college. Class Frequency (F i) Class Midpoint (X i) F i X i 10-20 10 15 150 20-30 15
Question: The following distribution shows the prices of books at a college.
Class Frequency (F i ) Class Midpoint (X i ) F i X i
10-20 10 15 150
20-30 15 25 375
30-40 15 35 525
40-50 20 45 900
Sum = 60 = n Sum = 1950
Find:
- The mean.
- The variance (assume it is a population.)
Deliverable: Word Document 
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