Cure for the Common Cold? An experimentwas planned to compare the mean time (in
Chapter 9, Problem 21(choose chapter or problem)
Cure for the Common Cold? An experimentwas planned to compare the mean time (in days)required to recover from a common cold for personsgiven a daily dose of 4 milligrams (mg) of vitamin Cversus those who were not given a vitamin supplement.Suppose that 35 adults were randomly selected for each treatment category and that the mean recovery times andstandard deviations for the two groups were as follows:No Vitamin 4 mgSupplement Vitamin CSample Size 35 35Sample Mean 6.9 5.8Sample Standard Deviation 2.9 1.2a. If your research objective is to show that the use ofvitamin C reduces the mean time required torecover from a common cold and its complications,give the null and alternative hypotheses for the test.Is this a one- or a two-tailed test?b. Conduct the statistical test of the null hypothesisin part a and state your conclusion. Test usinga .05.
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