Question: b) Is it an observational or experimental study? Explain. c) Use a 0.05 significance level, does this sample show that prices at Aldi are lower

b) Is it an observational or experimental study? Explain. c) Use a 0.05 significance level, does this sample show that prices at Aldi are lower than at Walmart on average? State the null and alternative hypothesis. d) State the parameter of interest for this study

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