1.1 A researcher wants to test the hypothesis that there is no difference in the importance attached to shopping by consumers living in Belgium, France, Germany and the Netherlands. A study is conducted and analysis of variance is used to analyse the data. The results obtained are presented in the following table:

a Is there sufficient evidence to reject the null hypothesis?
b What conclusion can be drawn from the table?
c If the average importance was computed for each group, would you expect the sample means to be similar or different?
d What was the total sample size in this study?

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Source df Sum of squares Mean squares Fratio F probability Between groups 3 70.212 23.404 1.12 0.3 Within groups 996 20,812.416 20.896