An experiment was designed to compare the lengths of time that four different drugs provided pain relief after surgery. The results (in hours) follow. Is there enough evidence to reject the null hypothesis that there is no significant difference in the length of pain relief provided by the four drugs at a = .05? Drug

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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An experiment was designed to compare the lengths of time that four different drugs
provided pain relief after surgery. The results (in hours) follow. Is there enough evidence to
reject the null hypothesis that there is no significant difference in the length of pain relief
provided by the four drugs at a = .05?
Drug
АВCD
25 12 2
7412 2
2384
65 8
10
(a) Find the test statistic. (Give your answer correct to two decimal places.)
(ii) Find the p-value. (Give your answer bounds exactly.)
<p <
Transcribed Image Text:An experiment was designed to compare the lengths of time that four different drugs provided pain relief after surgery. The results (in hours) follow. Is there enough evidence to reject the null hypothesis that there is no significant difference in the length of pain relief provided by the four drugs at a = .05? Drug АВCD 25 12 2 7412 2 2384 65 8 10 (a) Find the test statistic. (Give your answer correct to two decimal places.) (ii) Find the p-value. (Give your answer bounds exactly.) <p <
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