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Approximate Population Mean and Standard Deviation

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The frequency distribution summarizes a sample of times (in minutes) between eruptions of a certain geyser. Find the approximate population mean and approximate population standard deviation of the data.

Time Frequency
40-49 8
50-59 43
60-69 25
70-79 7
80-89 104
90-99 12
100-109 1

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Solution Summary

This solution calculates the approximate population mean and standard deviation in an Excel sheet where all workings and formulas are shown.

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