WEEK 6 PROBLEMS-2.docx - HLTH 501 WEEK 6 PROBLEMS30 POINTS...

Info icon This preview shows pages 1–3. Sign up to view the full content.

HLTH 501 W EEK 6 P ROBLEMS —30 POINTS 10 points each. Place answers in the following table: 1. 1. A company is evaluating the impact of a wellness program offered on-site as a means of reducing employee sick days. A total of 8 employees agree to participate in the evaluation which lasts 12 weeks. Their sick days in the 12 months prior to the start of the wellness program and again over the 12 months after the completion of the program are recorded and are shown below. Is there a significant reduction in the number of sick days taken after completing the wellness program? Use the Sign Test at a 5% level of significance. Complete the table below. 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 ) (null ) 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= ___7___ Critical value= ___0_____ Smaller of the number of positive or negative signs= _____1___ Based on comparing the smaller of the number of positive or negative signs to the Critical value which of the following is (are) true? A. There is statistically significant evidence at alpha=0.05 to show that t he median difference (reduction) is positive . B. There is not statistically significant evidence at alpha=0.05 to show that the median difference (reduction) is positive. C. There are not enough data points to reach a conclusion. D. The tied value makes the analysis suspect. 2. Page 1 of 7
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

HLTH 501 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 4.2 4.9 2 3.9 2 6 4.8 5.3 3 4.2 3 8 3.3 5.4 4 4.6 5 9 3.9 4.6 5 4.8 7 10 6 4.9 7 5 8 5.1 9 5.3 10 5.4 R 1 =___18_ R 2 =__37__ 2. cont. ________ R 2 1) (n n n n U 1 1 1 2 1 1 25+15-18=22 U1=22 ________ R 2 1) (n n n n U 2 2 2 2 1 2 25+15-37=3 U2=3 Alpha= _____0.05__ N 1 = _____5___ N 2 = _______5_ Critical value U= ___2_____ Smaller of U 1 and U 2
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.
  • Fall '10
  • CarlyTanner
  • Statistics, Statistical significance, critical value, significant evidence, Kruskal Wallis

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern