7. Researchers are studying the pain-killing effects of a new drug excedrol. They administered the drug to a test sample and a placebo to a control sample. People reported the improvement in their symptoms on a scale of 1 to 5. The results are st.dev. n mean Excedrol Placebo 50 3.35 50 2.12 1.24 1.80 At the level of 1%, test the hypothesis that excedrol performs better than placebo.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.1: Measures Of Center
Problem 4GP
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7. Researchers are studying the pain-killing effects of a new drug excedrol.
They administered the drug to a test sample and a placebo to a control
sample. People reported the improvement in their symptoms on a scale
of 1 to 5. The results are
st.dev.
n
mean
Excedrol
Placebo
50 3.35
50 2.12 1.24
1.80
At the level of 1%, test the hypothesis that excedrol performs better
than placebo.
Transcribed Image Text:7. Researchers are studying the pain-killing effects of a new drug excedrol. They administered the drug to a test sample and a placebo to a control sample. People reported the improvement in their symptoms on a scale of 1 to 5. The results are st.dev. n mean Excedrol Placebo 50 3.35 50 2.12 1.24 1.80 At the level of 1%, test the hypothesis that excedrol performs better than placebo.
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