A company claims that its medicine, Brand A, provides fasterrelief fom pain than

Question

A company claims that its medicine, Brand A, provides fasterrelief fom pain than another company's medicine, Brand B. Aresearcher tested both brands of medicine on two groups of randomlyselected patients. The results of the test are given in thefollowing table. The mean and standard dev of releif timesare in minutes Brand A Sample Size Mean of relief times Standard Deviation A 25 44 11 B 22 49 9 Test at the 1% level of significance whether the mean relieftime for brand A is less than that for Brand B A company claims that its medicine, Brand A, provides fasterrelief fom pain than another company's medicine, Brand B. Aresearcher tested both brands of medicine on two groups of randomlyselected patients. The results of the test are given in thefollowing table. The mean and standard dev of releif timesare in minutes Brand A Sample Size Mean of relief times Standard Deviation A 25 44 11 B 22 49 9 Test at the 1% level of significance whether the mean relieftime for brand A is less than that for Brand B Brand A Sample Size Mean of relief times Standard Deviation A 25 44 11 B 22 49 9

Explanation / Answer

=0.01, Z(0.005)=-2.58 The test hypothesis is Ho:A>=A Ha:A-2.58, we do not reject Ho.

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