What type of hypothesis test should be performed? Select Select What is the test statistic? Left-tailed z-test Paired t-test Two-tailed z-test Unpaired t-test 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 a = 0.05 significance level?
What type of hypothesis test should be performed? Select Select What is the test statistic? Left-tailed z-test Paired t-test Two-tailed z-test Unpaired t-test 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 a = 0.05 significance level?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Transcribed Image Text:## Battery Voltage Testing
### Overview
The mean voltage and standard deviation of 20 batteries from each of two manufacturers were measured. The results are summarized in the table below:
| Manufacturer | Sample Mean Voltage (millivolts) | Population Standard Deviation (millivolts) |
|--------------|---------------------------------|------------------------------------------|
| A | 101 | 2 |
| B | 99 | 3 |
### Statistical Analysis
1. **Hypothesis Test Selection:**
A dropdown menu provides options for selecting the type of hypothesis test to be performed:
- Left-tailed z-test
- Paired t-test
- Two-tailed z-test
- Unpaired t-test
2. **Test Statistic:**
A blank field is provided to enter the calculated test statistic.
3. **Degrees of Freedom:**
A blank field is provided to enter the number of degrees of freedom for the chosen test.
### Conclusion
- A question is posed: "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?"
- A blank field is provided for the response.
This setup guides users in exploring the statistical methods needed to analyze the difference in battery voltages between two manufacturers.
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