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

Question

Quizplus · Accepted Answer

The null hypothesis for testing whether blocking is effective would relate to whether the means are the same for each day of the week (Saturday, Sunday, and weekday). Therefore, choice B is the best option as it specifies the means for each day of the week. The other answer choices either do not relate to the means or do not specify the days of the week.

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