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Author Question: We are interested in comparing the average supermarket prices of two leading colas. Our sample was ... (Read 132 times)

c0205847

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on: Feb 14, 2020
We are interested in comparing the average supermarket prices of two leading colas. Our sample was taken by randomly selecting eight supermarkets and recording the price of a six-pack of each brand of cola at each supermarket. The data are shown in the following table:

Price


If the problem above represented a paired difference, what assumptions are needed for a confidence interval for the mean difference to be valid?
◦ The population variances are equal.
◦ The population of paired differences has an approximately normal distribution.
◦ The samples were independently selected from each population.
◦ All of the above are needed.
Statistics ¦ McClave, Sincich, Tamarack ¦ 12th Edition
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Marked as best answer by c0205847 on Feb 14, 2020

xthemafja

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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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c0205847

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Reply 2 on: Feb 14, 2020
Great answer, keep it coming :)

Sarahjh

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Reply 3 on: Yesterday
Wow, this really help

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