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
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
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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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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