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Author Question: Which supermarket has the lowest prices in town? All claim to be cheaper, but an independent agency ... (Read 54 times)

V@ndy87

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on: Feb 14, 2020
Which supermarket has the lowest prices in town? All claim to be cheaper, but an independent agency recently was asked to investigate this question. The agency randomly selected 100 items common to each of two supermarkets (labeled A and B) and recorded the prices charged by each supermarket. The summary results are provided below:

    A = 2.09     B = 1.99       = .10
    sA = 0.22     sB = 0.19     sd = .03

Assuming a matched pairs design, which of the following assumptions is necessary for a confidence interval for the mean difference to be valid?
◦ The population of paired differences has an approximate normal distribution.
◦ The samples are randomly and independently selected.
◦ None of these assumptions are necessary.
◦ The population variances must be equal.
Statistics ¦ McClave, Sincich, Tamarack ¦ 12th Edition
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Marked as best answer by V@ndy87 on Feb 14, 2020

Anonymous

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Reply #1 on: Feb 14, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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V@ndy87

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Reply 2 on: Feb 14, 2020
Excellent

xiazhe

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Reply 3 on: Yesterday
Gracias!

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