Question: Skunk Hollow Arkansas is proud of their energy conservation program

Skunk Hollow, Arkansas, is proud of their energy conservation program. They want to know how much energy they have saved. A sample of 40 houses reveals an average saving of 47.5 kilowatt hours per week with a standard deviation of 55. Put a 90% confidence limit around your best estimate of the average savings. Could this sample have been drawn from a population with a mean of 35?

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  • CreatedNovember 11, 2015
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