SOLUTION: Please show all work. Include formulas, calculations, or definitions necessary to solve the problems. I recommend that you use Excel. You may also use Word, but must attach the
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-> SOLUTION: Please show all work. Include formulas, calculations, or definitions necessary to solve the problems. I recommend that you use Excel. You may also use Word, but must attach the
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Question 855891: Please show all work. Include formulas, calculations, or definitions necessary to solve the problems. I recommend that you use Excel. You may also use Word, but must attach the Excel workbook used for calculations or paste the work in the document. Feel free to ask me questions in a Private Message before the due date.
1) A consumer advocacy group wants to determine whether there is a (statistically significant) difference between the proportions of the two leading automobile models that need major repairs within 2 years of purchase. A major repair is defined as “more than $500.”
A sample of 520 owners of the Model A is contacted, and 85 owners indicated that their vehicles needed major repairs within 2 years. A sample of 610 owners of Model B is contacted, and 108 owners indicated that their vehicles needed major repairs within 2 years.
Test the null hypothesis that no difference exists between the proportions in populations A and B needing major repairs against the alternative hypothesis that a difference does exist. Use a = 0.01.
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