Does it really matter financially where you grocery shop? Are the prices at one grocery store consistently higher or lower than those at another? €œShopping the grocers,€ an article in the Democrat & Chronicle, featured a comparison of products bought at four local supermarkets. The data were analyzed using ANOVA techniques, and the results follow.

a. State the null and alternative hypotheses.
b. Based on the information on the computer printout shown, state the decision and conclusion to the hypothesis test.
c. Using the statistics given for each store, does there seem to be a difference among the mean grocery cost for these four supermarkets?
d. Using the statistics given for each store, does there appear to be a difference among the standard deviations for these four supermarkets?
e. How do your answers in parts c and d support your answer in part b? Explain.

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One-way ANOVA: Martins, Tops, Wal-Mart, Wegmans Source DF Factor Error Total S 2.430 SS MS 0.50 0.17 330.74 5.91 331.24 0.15% 0.03 0.993 56 59 R-Sq R-Sq(adj) 0.00% Individual 95% CIs For Mean Based on Pooled StDev Level Martins 15 2.542 2.241 Tops Wal-Mart 15 2473 2173 Wegmans 15 2.723 2.935 15 2.596 2.294 1.40 2.10 2.80 3.50 Pooled StDev = 2.430