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 10,745kWh of electricity last year. Assuming that the population standard deviation is 2198kWh, 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 10,745kWh of electricity last year. Assuming that the population standard deviation is 2198kWh, 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.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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 10,745kWh of electricity last year. Assuming that the population standard deviation is 2198kWh, 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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