The mean voltage and standard deviation of 7 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer A Sample mean voltage (millivolts): 128 Sample standard deviation (millivolts): 2 Manufacturer B Sample mean voltage (millivolts): 125 Sample standard deviation (millivolts): 5 What type of hypothesis test should be performed? Unpaired t-test Two-tailed z-test Left-tailed z-test Paired t-test What is the test statistic? What is the number of degrees of freedom? Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the α = 0.01 significance level? Yes No
The mean voltage and standard deviation of 7 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer A Sample mean voltage (millivolts): 128 Sample standard deviation (millivolts): 2 Manufacturer B Sample mean voltage (millivolts): 125 Sample standard deviation (millivolts): 5 What type of hypothesis test should be performed? Unpaired t-test Two-tailed z-test Left-tailed z-test Paired t-test What is the test statistic? What is the number of degrees of freedom? Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the α = 0.01 significance level? Yes No
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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The
Manufacturer A
Sample mean voltage (millivolts): 128
Sample standard deviation (millivolts): 2
Manufacturer B
Sample mean voltage (millivolts): 125
Sample standard deviation (millivolts): 5
What type of hypothesis test should be performed?
Unpaired t-test
Two-tailed z-test
Left-tailed z-test
Paired t-test
What is the test statistic?
What is the number of degrees of freedom?
Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the α = 0.01 significance level?
Yes
No
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