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An automotive parts supplier assesses the usability and quality of the door locks that they provide....

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Question

Basic Math

An automotive parts supplier assesses the usability and qualityof the door locks that they provide. The locks are manufactured atthree different plants. The production manager wants to determinewhether the plant affects the final product. The production managercollects data on locks from each plant, and gives a usability andquality rating. Data are found in the file Car LockRatings.

a) State the null and alternate hypothesis we would run todetermine if the Usability rating across all threemanufacturing plants is the same.

b) Run a one-way ANOVA on these data. Show output.

c) What conclusions can you make based on the p-value of thistest?

d) Obtain boxplot, residuals scatter plot, and individualresidual Normal probability plots.

e) Have all assumptions been met? Explain using your plots toillustrate your answer.

Usibility Rating
Plant APlant BPlant C
565
644
556
646
635
547
456
355
464
554
454
365
675
776
865
676
866
75
66
57
65
7
7
8

Answer & Explanation Solved by verified expert
3.7 Ratings (410 Votes)
a The hypothesis being tested isH0 1 2 3Ha At least one means is not equalb The OneWay ANOVA output    See Answer
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