Three different brands of tires were compared for wear characteristics. From each brand of tire, ten tires were randomly selected and subjected to standard wear-testing procedures. The average mileage obtained for each brand of tire and sample variances (both in 1,000 miles) are shown below.
At 95% confidence, test to see if there is a significant difference in the average mileage of the three brands.

Question

Three different brands of tires were compared for wear characteristics. From each brand of tire, ten tires were randomly selected and subjected to standard wear-testing procedures. The average mileage obtained for each brand of tire and sample variances (both in 1,000 miles) are shown below.
  At 95% confidence, test to see if there is a significant difference in the average mileage of the three brands.

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The Answer of Three different brands of tires were compared for wear characteristics. From each brand of tire, ten tires were randomly selected and subjected to standard wear-testing procedures. The average mileage obtained for each brand of tire and sample variances (both in 1,000 miles) are shown below.
  At 95% confidence, test to see if there is a significant difference in the average mileage of the three brands.

Three Different Brands of Tires Were Compared for Wear Characteristics