10 luxury summer houses in Bodrum are appraised by the 4 real estate agents. They express their appraisals in thousands of dollars. Below the table shows the results.

Source of VariationSum of SquaresBetween agents320Between houses1200Error2100

Test the null hypothesis that population mean assessments are the same for these four realestate agents against the alternative hypothesis that at least one of thepopulation mean assessmentsis different from the others.

(Note: Questions form (9) to (14) are interrelated and will be answered based on this problem.)

(9)Calculate themean squares between agents. (In your answer, usetwodecimal places, e.g.3.14)