LSSGB: Which one of the following statistical tests is best suited for analysis?

A company wishes to compare the expected mileage of eight different types of car tires.

OPTIONS

• multiple regression
• ANOVA
• paired-difference tests
• Z-test

ANSWER

ANOVA

EXPLANATION

ANOVA is a statistical test that evaluates the difference among means of three or more samples. In this example, each of the eight tires could be tested and its average expected mileage is recorded. ANOVA analysis determines whether at least 2 of the tires have significantly different mileages.