Unformatted text preview: medication are shown in the table below. 4 hours between doses 6 hours between doses 8 hours between doses Developed colds 5 7 12 No colds 17 12 10 a. What are the independent and dependent variables? b. What type of data are these? c. Do the 5 step hypothesis test d. What conclusions do you draw from these data? State your conclusions in terms of the problem. 3. A survey of 200 users of hair shampoo led to the contingency table given below Usage Rate Male Female Total Light 48 32 80 Medium 38 42 80 Heavy 14 26 40 Total 100 100 200 A manufacturer of personal care products noted in the survey that more women than men are heavy users and more men than women are light users. Considering the possibility that the observed relationship in the sample between gender and usage rate might just be a sampling fluke, use the chi-square distribution to test the hypothesis of no relationship between usage rate and gender....
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- Fall '07
- Statistics, Common cold, Fisher's method, Rhinovirus, Usage Rate