A company claims that the mean monthly residential electricity consumption in a certain region is more than 860 kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of 66 residential customers has a mean monthly consumption of 900 kWh. Assume the population standard deviation is 123 kWh. At a = 0.10, can you support the claim? Complete parts (a) through (e). ©) Find the standardized test statistic. Use technology The standardized test statistic is z= 2.64 (Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. O A. Reject H, because the standardized test statistic is not in the rejection region. O B. Fail to reject Hn because the standardized test statistic is in the rejection region. O C. Fail to reject Ho because the standardized test statistic is not in the rejection region. D. Reject H, because the standardized test statistic is in the rejection region. (e) Interpret the decision in the context of the original claim. v the claim that the mean monthly residential electricity consumption in a certain region VkWh At the 10% significance level, there V enough evidence to

A company claims that the mean monthly residential electricity consumption in a certain region is more than 860 kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of 66 residential customers has a mean monthly consumption of 900 kWh. Assume the population standard deviation is 123 kWh. At a = 0.10, can you support the claim? Complete parts (a) through (e). ©) Find the standardized test statistic. Use technology The standardized test statistic is z= 2.64 (Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. O A. Reject H, because the standardized test statistic is not in the rejection region. O B. Fail to reject Hn because the standardized test statistic is in the rejection region. O C. Fail to reject Ho because the standardized test statistic is not in the rejection region. D. Reject H, because the standardized test statistic is in the rejection region. (e) Interpret the decision in the context of the original claim. v the claim that the mean monthly residential electricity consumption in a certain region VkWh At the 10% significance level, there V enough evidence to

Name: A company claims that the mean monthly residential electricity consum
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Description: A company claims that the mean monthly residential electricity consumption in a certain region is more than 860 kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of 66 residential customers has amean monthly consumptio

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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