A coin-operated drink machine was designed to discharge a mean of 6 fluid ounces of coffee per cup. In a test of the machine, the discharge amounts in 17 randomly chosen cups of coffee from the machine were recorded. The sample mean and sample standard deviation were 5.98 fluid ounces and 0.18 fluid ounces, respectively. If we assume that the discharge amounts are approximately normally distributed, is there enough evidence, to conclude that the population mean discharge, μ, differs from 6 fluid ounces? Use the 0.10 level of significance. Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.)
A coin-operated drink machine was designed to discharge a mean of 6 fluid ounces of coffee per cup. In a test of the machine, the discharge amounts in 17 randomly chosen cups of coffee from the machine were recorded. The sample mean and sample standard deviation were 5.98 fluid ounces and 0.18 fluid ounces, respectively. If we assume that the discharge amounts are approximately normally distributed, is there enough evidence, to conclude that the population mean discharge, μ, differs from 6 fluid ounces? Use the 0.10 level of significance. Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
![**Hypothesis Testing for a Drink Machine**
A coin-operated drink machine was designed to discharge a mean of 6 fluid ounces of coffee per cup. In a test of the machine, discharge amounts from 17 randomly chosen cups of coffee were recorded. The sample mean and sample standard deviation were 5.98 fluid ounces and 0.18 fluid ounces, respectively.
The objective is to determine if there is enough evidence to conclude that the population mean discharge (\(\mu\)) differs from 6 fluid ounces, using a 0.10 level of significance. This involves performing a two-tailed test.
**Steps in Hypothesis Testing:**
1. **State the Hypotheses:**
- Null Hypothesis (\(H_0\)): \(\mu = 6\)
- Alternative Hypothesis (\(H_1\)): \(\mu \neq 6\)
2. **Choose the Test Statistic:**
- Likely a t-test or z-test would be used depending on known parameters and sample size.
3. **Calculate the Test Statistic:**
- Use sample mean, population mean, sample standard deviation, and sample size.
- Ensure to round to three or more decimal places for precision.
4. **Determine the Critical Values:**
- Based on the 0.10 significance level, find the critical values from the appropriate distribution table (t or z).
5. **Make a Conclusion:**
- Compare the test statistic to the critical values to decide whether to reject or fail to reject the null hypothesis.
- Conclusion: Can we conclude that the mean discharge differs from 6 fluid ounces? Answer Yes or No based on the test results.
**Note:** Carry intermediate computations to three or more decimal places for accuracy. Consultant statistical formulas or tables as needed to determine the type of test and critical values.
This process is essential for quality control and ensuring the machine operates within the desired parameters.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F87b92f43-2f4d-4033-8a65-475879bd1817%2F13160305-831a-44c3-80dc-7da883ee5f93%2F6w4wx7o_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Hypothesis Testing for a Drink Machine**
A coin-operated drink machine was designed to discharge a mean of 6 fluid ounces of coffee per cup. In a test of the machine, discharge amounts from 17 randomly chosen cups of coffee were recorded. The sample mean and sample standard deviation were 5.98 fluid ounces and 0.18 fluid ounces, respectively.
The objective is to determine if there is enough evidence to conclude that the population mean discharge (\(\mu\)) differs from 6 fluid ounces, using a 0.10 level of significance. This involves performing a two-tailed test.
**Steps in Hypothesis Testing:**
1. **State the Hypotheses:**
- Null Hypothesis (\(H_0\)): \(\mu = 6\)
- Alternative Hypothesis (\(H_1\)): \(\mu \neq 6\)
2. **Choose the Test Statistic:**
- Likely a t-test or z-test would be used depending on known parameters and sample size.
3. **Calculate the Test Statistic:**
- Use sample mean, population mean, sample standard deviation, and sample size.
- Ensure to round to three or more decimal places for precision.
4. **Determine the Critical Values:**
- Based on the 0.10 significance level, find the critical values from the appropriate distribution table (t or z).
5. **Make a Conclusion:**
- Compare the test statistic to the critical values to decide whether to reject or fail to reject the null hypothesis.
- Conclusion: Can we conclude that the mean discharge differs from 6 fluid ounces? Answer Yes or No based on the test results.
**Note:** Carry intermediate computations to three or more decimal places for accuracy. Consultant statistical formulas or tables as needed to determine the type of test and critical values.
This process is essential for quality control and ensuring the machine operates within the desired parameters.
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 6 steps with 4 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Recommended textbooks for you
![MATLAB: An Introduction with Applications](https://www.bartleby.com/isbn_cover_images/9781119256830/9781119256830_smallCoverImage.gif)
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
![Probability and Statistics for Engineering and th…](https://www.bartleby.com/isbn_cover_images/9781305251809/9781305251809_smallCoverImage.gif)
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
![Statistics for The Behavioral Sciences (MindTap C…](https://www.bartleby.com/isbn_cover_images/9781305504912/9781305504912_smallCoverImage.gif)
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
![MATLAB: An Introduction with Applications](https://www.bartleby.com/isbn_cover_images/9781119256830/9781119256830_smallCoverImage.gif)
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
![Probability and Statistics for Engineering and th…](https://www.bartleby.com/isbn_cover_images/9781305251809/9781305251809_smallCoverImage.gif)
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
![Statistics for The Behavioral Sciences (MindTap C…](https://www.bartleby.com/isbn_cover_images/9781305504912/9781305504912_smallCoverImage.gif)
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
![Elementary Statistics: Picturing the World (7th E…](https://www.bartleby.com/isbn_cover_images/9780134683416/9780134683416_smallCoverImage.gif)
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
![The Basic Practice of Statistics](https://www.bartleby.com/isbn_cover_images/9781319042578/9781319042578_smallCoverImage.gif)
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
![Introduction to the Practice of Statistics](https://www.bartleby.com/isbn_cover_images/9781319013387/9781319013387_smallCoverImage.gif)
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman