Six Sigma Black Belt Exam Prep

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A company wishes to compare the expected mileage of eight different types of car tires. Which of the following statistical tests is best suited for the analysis?

multiple regression
ANOVA
paired-difference test
Z-test

Explanation

Answer: B - ANOVA is the statistical test best suited for this analysis.

Key Takeaway: Analysis of Variance (ANOVA) is a statistical test that evaluates the differences among means of three or more samples. In this example, each of the eight car tires would be tested and its average expected mileage is recorded. ANOVA analysis determines whether at least 2 of the tires have significantly different mileages.

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