A Major Consumer Group Recently Undertook a Study to Determine

Multiple Choice

A major consumer group recently undertook a study to determine whether automobile customers would rate the quality of cars differently whether they were manufactured in the U.S., Europe, or Japan. To conduct this test, a sample of 20 individuals was asked to look at mid-range model cars made in each of the three countries. The individuals in the sample were then asked to provide a rating for each car on a scale of 1 to 1000. The following computer output resulted, and the tests were conducted using a significance level equal to 0.05. ANOVA: Two-Factor Without Replication Based upon the data, which of the following statements is true?

A) Blocking was effective.
B) Blocking was not effective.
C) The primary null hypothesis should not be rejected.
D) The averages for the 20 people are not all the same.