A Random Sample of 40 Companies with Assets Over $10

Multiple Choice

A random sample of 40 companies with assets over $10 million was surveyed and asked to indicate their industry and annual computer technology expense. The ANOVA comparing the average computer technology expense among three industries rejected the null hypothesis. The mean square error (MSE) was 195. The following table summarized the results: When comparing the mean annual computer technology expense for companies in the education and tax services industries, which of the following 95% confidence interval can be constructed?

A) 13.5 ± 2.026 * 5.78
B) 13.5 ± 2.021 * 5.78
C) 13.5 ± 2.026 * 13.96
D) 13.5 ± 2.021 * 13.96