The mean voltage and standard deviation of 8 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Population standard deviation(millivolts) A 149 3 B 143 5 What type of hypothesis test should be performed? _______ select (left-tailed z-test, paired t-test,two-tailed z-test, unpaired 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=0.05 significance level?______ select (no or yes)
The mean voltage and standard deviation of 8 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Population standard deviation(millivolts) A 149 3 B 143 5 What type of hypothesis test should be performed? _______ select (left-tailed z-test, paired t-test,two-tailed z-test, unpaired 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=0.05 significance level?______ select (no or yes)
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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The mean voltage and standard deviation of 8 batteries from each manufacturer were measured. The results are summarized in the following table.
| Manufacturer | Sample mean voltage (millivolts) | Population standard deviation(millivolts) |
|---|---|---|
| A | 149 | 3 |
| B | 143 | 5 |
What type of hypothesis test should be performed? _______ select (left-tailed z-test, paired t-test,two-tailed z-test, unpaired 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=0.05 significance level?______ select (no or yes)
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