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company claims that the mean monthly reside oWatt-hours (kWh). You want to test this clain onthly consumption of 900 kWh. Assume the e claim? Complete parts (a) through (e). A. The rejection regions are z< -2.33 and VB. The rejection region is z>2.33. The rainction rosion is 72.33

company claims that the mean monthly reside oWatt-hours (kWh). You want to test this clain onthly consumption of 900 kWh. Assume the e claim? Complete parts (a) through (e). A. The rejection regions are z< -2.33 and VB. The rejection region is z>2.33. The rainction rosion is 72.33

MATLAB: An Introduction with Applications
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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Identify the standardized test statistic use technology. 
decide whether to reject or fail the null hypothesis and interpret the decision in the context of Original claim 

A company claims that the mean monthly residential electricity consumption in a certain region is more than 880 kilowatt-hours (kWh). You want to test this claim. You find that a random sample of 69 residential customers has a mean monthly consumption of 900 kWh. Assume the population standard deviation is 126 kWh. At a= 0.01, can you support the claim? Complete parts (a) through (e). A. The rejection regions are z< -2.33 and z>2.33. B. The rejection region is z>2.33. C. The rejection region is z < 2.33. (c) Find the standardized test statistic. Use technology. The standardized test statistic is z = (Round to two decimal places as needed.) B Hill
Transcribed Image Text:A company claims that the mean monthly residential electricity consumption in a certain region is more than 880 kilowatt-hours (kWh). You want to test this claim. You find that a random sample of 69 residential customers has a mean monthly consumption of 900 kWh. Assume the population standard deviation is 126 kWh. At a= 0.01, can you support the claim? Complete parts (a) through (e). A. The rejection regions are z< -2.33 and z>2.33. B. The rejection region is z>2.33. C. The rejection region is z < 2.33. (c) Find the standardized test statistic. Use technology. The standardized test statistic is z = (Round to two decimal places as needed.) B Hill
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