A chain of fast food restaurants wants to compare the average service times at three different restaurants.It wants to conduct a hypothesis test to determine if all three means are the same or not,at the 0.05 level of significance.If n = 7 observations are taken at each of the three restaurants,the critical value is F = 3.555.

Question

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The critical value is used to determine the significance of the test statistic. If the test statistic is greater than the critical value, then the null hypothesis is rejected. In this case, the critical value is F = 3.555, which means that the null hypothesis will be rejected if the test statistic is greater than 3.555.

A Chain of Fast Food Restaurants Wants to Compare the Average