TC_Chapter_Problems_6

# TC_Chapter_Problems_6 - HLTH 501 WEEK 6 PROBLEMS30 POINTS...

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HLTH 501 W EEK 6 P ROBLEMS —30 POINTS 10 points each. Place answers in the following table: Employee Sick Days Taken in 12 Months Prior to Program Sick Days Taken in 12 Months Following program Difference ( Reduction = Prior-After ) Sign 1 8 7 1 + 2 6 6 0 3 4 5 -1 - 4 12 11 1 + 5 10 7 3 + 6 8 4 4 + 7 6 3 3 + 8 2 1 1 + Alpha= _____0.05_ n= ______8_ Critical value= ____0____ Smaller of the number of positive or negative signs= We do not reject H 0 becuase the smaller number that has negative sign is 1 and 1 > 0. Based on comparing the smaller of the number of positive or negative signs to the Critical value which of the following is (are) true? 1. There is statistically significant evidence at alpha=0.05 to show that the median difference (reduction) is positive. 2. There is not statistically significant evidence at alpha=0.05 to show that t he median difference (reduction) is positive . 3. There are not enough data points to reach a conclusion. 4. The tied value makes the analysis suspect. 2. Total Sample (Ordered Smallest to Largest) Ranks Mother Smoked in Pregnancy Mother Did Not Smoke in Pregnancy R a n k Smoked Did Not Smoke Smoked Did Not Smoke 5.0 5.1 1 3.3 1 4.2 4.9 2 3.9 2 4.8 5.3 3 4.2 3 3.3 5.4 4 4.6 4 3.9 4.6 5 4.8 5 Page 1 of 8

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HLTH 501 6 4.9 6 7 5.0 7 8 5.1 8 9 5.3 9 10 5.4 10 R 1 = 18 R 2 = 2. cont. ________ R 2 1) (n n n n U 1 1 1 2 1 1 n 1 = n 2 = 5 5 (5) + 5 (5 + 1= 6)/2 – 18 = 22 ________ R 2 1) (n n n n U 2 2 2 2 1 2 n 1 = n 2 = 5 5 (5) + 5 (5 + 1= 6)/2 – 37 = 3 Alpha= a=0.05 N 1 = _____5___ N 2 = _____5___ Critical value U= _ 5__ Smaller of U 1 and U 2 = _ We cannot reject H 0 because 3 >2, which indicated that we do not have enough data at 0.05 to show that both populations are not equal. Based on comparing the Smaller of U 1 and U 2 to the Critical value which of the following is (are) true? A. There is significant evidence at alpha=0.05 to show that the populations of birth weights in mothers who smoked in pregnancy and those who did not are not equal.
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• Fall '10
• CarlyTanner
• 5%, Statistical significance, 12 months, 12 weeks, Kruskal Wallis, 5.5 pounds

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