1. A dietician wishes to see if a person\'s cholesterol levelwill change if the

Question

1. A dietician wishes to see if a person's cholesterol levelwill change if the diet is supplememted by a certain mineral. Sixsubjects participate in the dietician's study. The subjects arepretested to determine their current cholesterol level. After theytake the mineral supplement for 6 weeks, the subjects are testedagain to dwetermine their cholesterol level. The results are shownin the table below. State the null and alternative hypothesis for ahopothesis test conducted at the 10% significance level in order todetermine whether the cholesterol level has been changed. Subject     1     2      3     4      5       6 Before     210   235   208 190   172   244 After      190    170    210 188   173   228 A. Ho: d= 0     Ha: o <0 B. Ho: d=0     Ha: d#0 C. Ho: d=0      Ha: d>0 D. Ho: 1 =2      Ha: 1 #2 E. Ho: 1 =2 Ha: 1 >2 2. Use the same information in question 1 for the same 6subjects. What would the test statistic be for a hypothesistest conducted at the 10% level of significance? Subject       1       2       3       4       5        6 Before       210     235  208     190   172    244 After         190     170   210     188    173    228 A. 1.17 B. -3.81 C. - 1.17 D. 1.61 E. 2.45 1. A dietician wishes to see if a person's cholesterol levelwill change if the diet is supplememted by a certain mineral. Sixsubjects participate in the dietician's study. The subjects arepretested to determine their current cholesterol level. After theytake the mineral supplement for 6 weeks, the subjects are testedagain to dwetermine their cholesterol level. The results are shownin the table below. State the null and alternative hypothesis for ahopothesis test conducted at the 10% significance level in order todetermine whether the cholesterol level has been changed. Subject     1     2      3     4      5       6 Before     210   235   208 190   172   244 After      190    170    210 188   173   228 A. Ho: d= 0     Ha: o <0 B. Ho: d=0     Ha: d#0 C. Ho: d=0      Ha: d>0 D. Ho: 1 =2      Ha: 1 #2 E. Ho: 1 =2 Ha: 1 >2 2. Use the same information in question 1 for the same 6subjects. What would the test statistic be for a hypothesistest conducted at the 10% level of significance? Subject       1       2       3       4       5        6 Before       210     235  208     190   172    244 After         190     170   210     188    173    228 A. 1.17 B. -3.81 C. - 1.17 D. 1.61 E. 2.45

Explanation / Answer

2. Answer D, 90% for a one tailed test,

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