Answered: The U.S. Energy Information…

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 10,817 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 174 of their customers and calculates that these customers used an average of 11,156⁢kWh of electricity last year. Assuming that the population standard deviation is 1913⁢kWh, is there sufficient evidence to support the power company's claim at the 0.05 level of significance.

Step 1 of 3 :

State the null and alternative hypotheses for the test. Choose one option below

H0: μ=10,817

HA: μ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯10,817

A.≠
B.<
C.>

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

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