1. A dietician wishes to see if a person\'s cholesterollevel will change if the
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1. A dietician wishes to see if a person's cholesterollevel will change if the diet is supplememted by a certain mineral.Six subjects 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. Do not reject the alternative hypothesis B, Reject the alternative hypothesis C. Reject the null hypothesis D. Do not reject the null hypothesis E. Accept the alternative hypothesis 2. A dietician wishes to see if a person's cholesterollevel will change if the diet is supplememted by a certain mineral.Six subjects 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. (-9.284, 42.617) B. (-4.22, 37.554) C. (-37.544, -4.22) D. (-42.617, 9.284) 1. A dietician wishes to see if a person's cholesterollevel will change if the diet is supplememted by a certain mineral.Six subjects 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. Do not reject the alternative hypothesis B, Reject the alternative hypothesis C. Reject the null hypothesis D. Do not reject the null hypothesis E. Accept the alternative hypothesis 2. A dietician wishes to see if a person's cholesterollevel will change if the diet is supplememted by a certain mineral.Six subjects 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. (-9.284, 42.617) B. (-4.22, 37.554) C. (-37.544, -4.22) D. (-42.617, 9.284) Subject 1 2 3 4 5 6 Before 210 235 208 190 172 244 After 190 170 210 188 173 228 A. (-9.284, 42.617) B. (-4.22, 37.554) C. (-37.544, -4.22) D. (-42.617, 9.284)Explanation / Answer
The two-tailed Pvalue equals 0.1549, not statistically significant.
The mean of Group One minus GroupTwo equals 17.50
95% confidence interval of this difference: From -9.37to 44.37 If you really want 90% CI, the range is narrower,(ie less negative than 9.37, less positive than 44.37)
Intermediate values used in calculations:
t = 1.6743
df = 5
standard error of difference = 10.452
Group Before Aft Mean 210.67 193.17 SD 27.02 22.26 SEM 11.03 9.09
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