Which supermarket has the lowest prices in town? All claim to be cheapest, but an independent agency recently was asked to investigate this question. The agency randomly selected 100 items common to...

Which supermarket has the lowest prices in town? All claim to be cheapest, but an independent agency recently was asked to investigate this question. The agency randomly selected 100 items common to each of two supermarkets (labelled A and B for confidentiality) and recorded the prices charged by each supermarket. The summary results are provided below:

_xA
= 2.09 x_B
= 1.99 d = .10
s_A = 0.22 s_B = 0.19 s_d = .03

Suppose the 95% confidence interval turned out to be (-.12, .02). Which of the following interpretations is correct?

Select one:

A. We are 95% confident that μ_A equals μ_B.

B. None of these interpretations is correct.

C. We are 95% confident that μ_A is larger than μ_B.

D. We are 95% confident that μ_B is larger than μ_A.

Jun 09, 2022

SOLUTION.PDF

Sun	Mon	Tue	Wed	Thu	Fri	Sat
30	31	1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	1	2	3

Which supermarket has the lowest prices in town? All claim to be cheapest, but an independent agency recently was asked to investigate this question. The agency randomly selected 100 items common to...

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