Mathematics, 27.12.2020 15:50 maddysmall32
Nausea from air sickness affects some travelers. In a comparative study of the effectiveness of two brands of motion sickness pills, brand A pills were given to 45 persons randomly selected from a group of 90 air travelers, while the other 45 persons were given brand B pills. The following results were obtained.
None. Slight Moderate Severe
Brand A 18 17 6 4
Brand B 11 14 14 6
Required:
a. Test at a significance level of 0.05 if it matters which brand of pill you take and whether it will help. A normal probability plot and test for equal variance has been provided whether you need it or not.
b. Is the degree of nausea associated with the brand of motion sickness pills? Test at α = 0.05.
c. How do we compute the degrees of freedom (dof) of the test statistic in part (a)? Why?
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