A marketing study was recently conducted to see whether the mean monthly sales for a department store located in four cities differ. A random sample of 6 months were selected from each store. Based upon this information, the appropriate null hypothesis to be tested is H0 : μ1 = μ2 = μ3 = μ4

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The null hypothesis H0: μ1 = μ2 = μ3 = μ4 suggests that there is no difference in the mean monthly sales among the four department stores, which is the appropriate hypothesis to test when looking to see if there are differences among the groups.

A Marketing Study Was Recently Conducted to See Whether the Mean