Question

- By using the same format to test null hypothesis throughout the lessons, please answer by writing to each step of testing the null hypothesis for the problem below; null hypothesis, alternative hypothesis, the appropriate statistical test, significance level, sampling distribution and degrees of freedom, critical region of null hypothesis, calculation of the test statistic, conclusion, interpration of the result. (9 points)

Kapitulnick et al. (1976) compared the metabolism of a drug, zoxazolamine, in placentas from 13 women who smoked during pregnancy and 11 who did not. The purpose of the study was to investigate the presence of the drug as a possible proxy for the rate, at which benzopyrene (a product of cigarette smoke) is metabolized. Please test the average zoxazolamine hydroxylase production of nonsmoker women with that of smoker women .

The following data were obtained in the measurements of zoxazolamine hydroxylase production (nmol 3 H2O formed /g/h):

nonsmoker (n= 11)                     smoker(n=13)

0.18        0.36                             0.66          4.86

0.36        0.5                               0.6            7.5

0.24        0.6                               0.96          9.0

0.5          0.56                             1.37         10.08

0.42        0.36                             1.51         14.76

0.68                                            3.56         16.57

                                                   3.36

Answer 1

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