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Range, variance, and standard deviation for the given sample data

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Old Faithful Geyser Listed below are intervals (in minutes) between eruptions of the Old Faithful geyser in Yellowstone National Park. Based on the results, is an interval of 100 minutes unusual?

98 92 95 87 96 90 65 92 95 93 98 94

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Solution Summary

Range, variance and standard deviation for a given sample data is determined. The solution determines if the interval of 100 minutes is unusual.

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Range =Maximum -Minimum =98-65=33
Mean =1095/12=91.25
Variance = =862.25/12=71.8541
Standard ...

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