A random sample of 40 companies with assets over $10 million was selected and as

Question

A random sample of 40 companies with assets over $10 million was selected and asked for their annual computer technology expense and industry. 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, the following 95% confidence interval can be constructed:


Based on the comparison between the mean computer technology expense for companies in the Tax Service and Food Service industries, the 95% confidence interval shows an interval of -14.85 to 5.85 for the difference. This result indicates that

Which is the correct answer listed below:

There is no significant difference between the two expenses.
The interval contains a difference of 20.7.
Companies in the Tax Service industry spend significantly less than companies in the Food Service industry.
Companies in the Food Service industry spend significantly less than companies in the Tax Service industry.

Explanation / Answer

The correct answer is- Companies in the Tax Service industry spend significantly less than companies in the Food Service industry.

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