Compute estimated mean of frequency distribution, standard deviation, variance
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31. Determine the estimated mean of the following frequency distribution.
Class Frequency
0 up to 5 2
5 up to 10 7
10 up to 15 12
15 up to 20 6
20 up to 25 3
94. Compute the range, the standard deviation, and the variance.
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
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Solution Summary
In a concise explanation, the answers and calculations are given for the two problems.
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31.
The population mean = SUM(average of each class * frequency) / N
= 380 / 30 = ...
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