Recently,a Department Store Chain Was Interested in Determining If There

question 57

Multiple Choice

Recently,a department store chain was interested in determining if there was a difference in the mean number of customers who enter the three stores in Seattle.The analysts set up a study in which the number of people entering the stores was counted depending on whether the day of the week was Saturday,Sunday,or a weekday.The following data were collected: Given this format,what is the null hypothesis for testing whether blocking is effective?

• A)H₀ : μ_A = μ_B = μ_C
• B)H₀ : μ_Sat = μ_Sun = μ_Week
• C)Not all means are equal.
• D)H₀ : σ₁ = σ₂ = σ₃

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