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The U.S. Energy Information Administration claimed that U.S. residential customers used an average of 10,368 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 128 of their customers and calculates that these customers used an average of 10,745⁢kWh of electricity last year. Assuming that the population standard deviation is 2198⁢kWh, is there sufficient evidence to support the power company's claim at the 0.05 level of significance?   Step 2 of 3 :   Compute the value of the test statistic. Round your answer to two decimal places.

The U.S. Energy Information Administration claimed that U.S. residential customers used an average of 10,368 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 128 of their customers and calculates that these customers used an average of 10,745⁢kWh of electricity last year. Assuming that the population standard deviation is 2198⁢kWh, is there sufficient evidence to support the power company's claim at the 0.05 level of significance?   Step 2 of 3 :   Compute the value of the test statistic. Round your answer to two decimal places.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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The U.S. Energy Information Administration claimed that U.S. residential customers used an average of 10,368 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 128 of their customers and calculates that these customers used an average of 10,745⁢kWh of electricity last year. Assuming that the population standard deviation is 2198⁢kWh, is there sufficient evidence to support the power company's claim at the 0.05 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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