significance? Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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The U.S. Energy Information Administration claimed that U.S. residential customers used an average of
10,941 kilowatt hours (kWh) of electricity this year. A local power company believes that residents in their
area use more electricity on average than EIA's reported average. To test their claim, the company
chooses a random sample of 115 of their customers and calculates that these customers used an
average of 11,425 kWh of electricity last year. Assuming that the population standard deviation is
3217 kWh, is there sufficient evidence to support the power company's claim at the 0.02 level of
significance?
Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places.
Transcribed Image Text:The U.S. Energy Information Administration claimed that U.S. residential customers used an average of 10,941 kilowatt hours (kWh) of electricity this year. A local power company believes that residents in their area use more electricity on average than EIA's reported average. To test their claim, the company chooses a random sample of 115 of their customers and calculates that these customers used an average of 11,425 kWh of electricity last year. Assuming that the population standard deviation is 3217 kWh, is there sufficient evidence to support the power company's claim at the 0.02 level of significance? Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places.
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