An electrician wants to know whether batteries made by two manufacturers have significantly different voltages. The voltage of 92 batteries from each manufacturer were measured. The population standard deviations of the voltage for each manufacturer are known. The results are summarized in the following table. ManufacturerSample mean voltage (millivolts)Population standard deviation(millivolts)A1123B1115 What type of hypothesis test should be performed? _______ select (left-tailed t-test,left-tailed z-test,right-tailed z-test,two-tailed z-test) What is the test statistic?______ Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the α=0.05 significance level?______ select (no or yes)

Given that Sample sizes n1=92 , n2=92 Sample means X̄1=112 , X̄2=111 ?1 =3…

Answered: An electrician wants to know whether…

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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An electrician wants to know whether batteries made by two manufacturers have significantly different voltages. The voltage of 92 batteries from each manufacturer were measured. The population standard deviations of the voltage for each manufacturer are known. The results are summarized in the following table.

Manufacturer	Sample mean voltage (millivolts)	Population standard deviation(millivolts)
A	112	3
B	111	5

What type of hypothesis test should be performed? _______ select (left-tailed t-test,left-tailed z-test,right-tailed z-test,two-tailed z-test)

What is the test statistic?______

Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the α=0.05 significance level?______ select (no or yes)

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