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Business Statistics : Mean from Frequency Distributions

31. Determine the estimated mean of the following frequency distribution.

Class Frequency
20 up to 30 7
30 up to 40 12
40 up to 50 21
50 up to 60 18
60 up to 70 12

94. A sample of the amounts paid for parking on Saturday at the Downtown Parking Garage in Toronto was organized into the following frequency distribution.
Amount Paid Frequency
$0.50 up to $0.75 2
0.75 up to 1.00 7
1.00 up to 1.25 15
1.25 up to 1.50 28
1.50 up to 1.75 14
1.75 up to 2.00 9
2.00 up to 2.25 3
2.25 up to 2.50 2

Solution Summary

Means are found from frequency distributions. The solution is detailed and well presented. The response received a rating of "5" from the student who originally posted the question.

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