zy Section 5.4- QNT/275T: Statistics X Oter/5/section/4 Making home > en two population means Chesis test for the difference between two population means. Jump to level 1 e mean voltage and standard deviation of 12 batteries from each manufacturer were easured. The results are summarized in the following table. Manufacturer A B + Sample mean voltage (millivolts) 106 101 What is the test statistic? Ex: 0.123 Population standard deviation (millivolts) Ex: 25 3 What type of hypothesis test should be performed? Select Select Left-tailed z-test Paired t-test Two-tailed z-test 5

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zy Section 5.4 - QNT/275T: Statistics X
/chapter/5/section/4
ision Making home >
tween two population means
ypothesis test for the difference between two population means.
Jump to level 1
The mean voltage and standard deviation of 12 batteries from each manufacturer were
measured. The results are summarized in the following table.
Sample mean
Manufacturer voltage (millivolts)
CHA
B
Check
+
106
101
What is the test statistic? Ex: 0.123
Next
What type of hypothesis test should be performed? Select
Select
Left-tailed z-test
Paired t-test
What is the number of degrees of freedom? Ex: 25 Two-tailed z-test
Unpaired t-test
Population standard
deviation(millivolts)
3
Does sufficient evidence exist to support the claim that the voltage of the batteries made
by the two manufacturers is different at the a = 0.05 significance level? [Select v
2
5
Transcribed Image Text:X zy Section 5.4 - QNT/275T: Statistics X /chapter/5/section/4 ision Making home > tween two population means ypothesis test for the difference between two population means. Jump to level 1 The mean voltage and standard deviation of 12 batteries from each manufacturer were measured. The results are summarized in the following table. Sample mean Manufacturer voltage (millivolts) CHA B Check + 106 101 What is the test statistic? Ex: 0.123 Next What type of hypothesis test should be performed? Select Select Left-tailed z-test Paired t-test What is the number of degrees of freedom? Ex: 25 Two-tailed z-test Unpaired t-test Population standard deviation(millivolts) 3 Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the a = 0.05 significance level? [Select v 2 5
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