Use the Following to Answer Questions

question 57

Short Answer

Use the following to answer questions :
A market research company randomly divides 12 stores from a large grocery chain into three groups of four stores each in order to compare the effect on mean sales of three different types of displays.The company uses display type 1 in four of the stores,display type 2 in four others,and display type 3 in the remaining four stores.Then it records the amount of sales (in $1,000's)during a one month period at each of the twelve stores.The table shown below reports the sales information.
By using ANOVA,we wish to test the null hypothesis that the means of the three corresponding populations are equal.The significance level is 1%.
-The value of SSW,rounded to two decimal places,is:

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