Report point estimate and a 99 confidence interval

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

notations as needed. Report point estimate and a 99% confidence interval for the corre- sponding odds ratio relating ectopic pregnancy to pelvic inflammatory disease. Do you expect these results to be the same as those from the 2 × 2 table analysis in (b)? 1
Image of page 1

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

2. A study was carried out to investigate the effect of a new drug in reducing operative mortality following major abdominal surgery. Patients were assigned to treatment or control groups within each of three categories of surgical risk: high, medium and low. The results were as follows: Surgical Risk Treatment Outcome Low Medium High Control Died 3 7 6 Survived 12 6 3 Treated Died 2 3 2 Survived 10 10 8 Denote by π the probability of death following surgery. Let x 1 = 1 for treatment and x 1 = 0 for control; x 2 = 1 for medium risk and x 2 = 0 otherwise; x 3 = 1 for high risk and x 3 = 0 otherwise. (a) Express each of the following hypotheses as a logistic regression model for π in terms of the appropriate linear predictor and determine the degrees of freedom for the deviance statistic. Do not impose any additional constraints besides those explicitly stated in words and define any additional covariates you require. i. H 1 : There is no association between treatment and outcome in any category of risk.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ 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