+(31289) پروژه R
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کد پروژه: 297775
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The file nauseatable.txt Download nauseatable.txtcontains data about post-operative nausea after medication against nausea. Two different medicines were administered to patients that complained about post-operative nausea. One of the medicines, Pentobarbital, was administered in two different doses.
a) Discuss whether a contingency table test is appropriate here. If yes, perform this test in order to test whether the different medicines work equally well against nausea. Where are the main inconsistencies?
b) Perform a permutation test in order to test whether the different medicines work equally well against nausea. Permute the medicine labels for this purpose. Use as test statistic the chisquare test statistic for contingency tables, which can be extracted from the output of the command chisq.test. (Hint: make a data frame in R consisting of two columns. One column should contain an indicator whether or not the patient in that row suffered from nausea, and the other column should indicate the medicine.)
c) Compare the p-value found by the permutation test with the p-value found from the chisquare test for contingency tables. Explain the difference/equality of the two p-values.
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