A random sample of 38 graduates was selected and asked for t

A random sample of 38 graduates was selected and asked for their annual income major. The ANOVA comparing the average income among three general discipline categores rejected the null hypothesis. The Mean Square Treatment (MST) was 80.284 and the Mean Square Error (MSE) was 24.182. The following table summarized the results:

When comparing the mean annual incomes for graduates in Business with those in Science/Math, the 95% ANOVA confidence interval shows an interval of -9.154 to 0.074. This result indicates that

Solution

There could be no difference among the population means since 0 is included in the confidence interval.