Question
In: Statistics and Probability
An automotive parts supplier assesses the usability and quality of the door locks that they provide....
An automotive parts supplier assesses the usability and quality of the door locks that they provide. The locks are manufactured at three different plants. The production manager wants to determine whether the plant affects the final product. The production manager collects data on locks from each plant, and gives a usability and quality rating. Data are found in the file Car Lock Ratings.
| Plant | Usability Rating |
| Plant A | 5 |
| Plant A | 6 |
| Plant A | 5 |
| Plant A | 6 |
| Plant A | 6 |
| Plant A | 5 |
| Plant A | 4 |
| Plant A | 3 |
| Plant A | 4 |
| Plant A | 5 |
| Plant A | 4 |
| Plant A | 3 |
| Plant A | 6 |
| Plant A | 7 |
| Plant A | 8 |
| Plant A | 6 |
| Plant A | 8 |
| Plant A | 7 |
| Plant A | 6 |
| Plant A | 5 |
| Plant A | 6 |
| Plant A | 7 |
| Plant A | 7 |
| Plant A | 8 |
| Plant B | 6 |
| Plant B | 4 |
| Plant B | 5 |
| Plant B | 4 |
| Plant B | 3 |
| Plant B | 4 |
| Plant B | 5 |
| Plant B | 5 |
| Plant B | 6 |
| Plant B | 5 |
| Plant B | 5 |
| Plant B | 6 |
| Plant B | 7 |
| Plant B | 7 |
| Plant B | 6 |
| Plant B | 7 |
| Plant B | 6 |
| Plant C | 5 |
| Plant C | 4 |
| Plant C | 6 |
| Plant C | 6 |
| Plant C | 5 |
| Plant C | 7 |
| Plant C | 6 |
| Plant C | 5 |
| Plant C | 4 |
| Plant C | 4 |
| Plant C | 4 |
| Plant C | 5 |
| Plant C | 5 |
| Plant C | 6 |
| Plant C | 5 |
| Plant C | 6 |
| Plant C | 6 |
| Plant C | 5 |
| Plant C | 6 |
| Plant C | 7 |
| Plant C | 5 |
- State the null and alternate hypothesis we would run to determine if the Usability rating across all three manufacturing plants is the same.
- Run a one-way ANOVA on these data. Show Minitab output.
- What conclusions can you make based on the p-value of this test?
- Obtain boxplots and residuals plots of this data set.
- Have all assumptions been met? Explain using your plots to illustrate your answer.
Solutions
orchestra answered 2 years agoRelated Solutions
An automotive parts supplier assesses the usability and quality of the door locks that they provide....
An automotive parts supplier assesses the usability and quality
of the door locks that they provide. The locks are manufactured at
three different plants. The production manager wants to determine
whether the plant affects the final product. The production manager
collects data on locks from each plant, and gives a usability and
quality rating. Data are found in the file Car Lock
Ratings.
a) State the null and alternate hypothesis we would run to
determine if the Usability rating across...
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