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Author Question: We randomly divide 200 volunteers with headaches into two groups who take identical-looking pills. ... (Read 2803 times)

mia

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on: Aug 31, 2019
We randomly divide 200 volunteers with headaches into two groups who take identical-looking pills. One group gets a homeopathic remedy and the other a placebo. After 20 minutes we ask them to rate their headache pain as "no change", "somewhat better", "much better", or "gone". What is the appropriate test?
◦ 2-proportion z-test
◦ χ2 test of homogeneity
◦ 2-sample t-test
◦ matched pairs t-test
◦ χ2 test of independence
Stats: Modeling the World ¦ Bock, Velleman, De Veaux ¦ 4th Edition
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Marked as best answer by mia on Aug 31, 2019

popopong

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Reply #1 on: Aug 31, 2019
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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mia

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Reply #2 on: Aug 31, 2019
TY


popopong

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Reply #3 on: Aug 31, 2019
You're welcome


RIVER RAWLE

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Reply #4 on: Apr 1, 2020
thank you


Jessica Gilbert

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Reply #5 on: Jan 13, 2021
Thank you!


Amy Cho

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Reply #6 on: Mar 26, 2021
Thank you


Abrahim Baluch

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Reply #7 on: Apr 9, 2021
Thank you


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