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

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 tyres could be tested and the average expected mileage is recorded. ANOVA analysis determines whether at least 2 of the tyres have significantly different mileages.