QUESTIONS AND ANALYSES a) Use appropriate methods to examine the relationship between right heart catheterization (swang1) and 30-day mortality (Death). The methods you use should provide achieve the following analysis goals: Determine if a significant relationship between right heart catheterization and mortality exists. Estimate the risk difference associated with right heart catheterization Estimate the risk in multiplicative terms. Summarize all your findings in regards to these three analysis goals. (10 pts.) b) Now consider adjusting for all of the covariates listed above. Use backward elimination or forward selection (using the default settings in JMP) to develop a logistic regression model that contains the most important covariates along with the right heart catheterization predictor (swang1), then calculate the OR for 30-day mortality associated with the Swan-Ganz right heart catheterization procedure adjusted for the other included covariates. Summarize your findings and be sure to explain how you arrived at your final multiple logistic regression model. (25 pts.) 2 - Effect of Fire on Germination of Banksia Serrata In order for to germinate, fire is required Banksia serrata to open its seed cones. In order to understand the effect of fire on these trees, two neighboring sites were surveyed. Site A has been burned frequently during the last 80 years, while fire at Site B has been infrequent during this same period. It is hypothesized that the different frequency of fire will result in larger median DBH for (in cm) at location B than at location A. Perform an appropriate nonparametric test B. serrata to see if the research hypothesis is supported by the data Site A 12 16 20 26 30 32 36 46 Site B 28 34 44 48 48 50 Summarize the test results and your conclusion. You may use JMP to perform the test or do it hand”. (6 pts.) “by 3 Beak Color and Length of Song – A study of the courtship behavior of domesticated zebra finches is run to determine the effect of beak color in the female on the number of song patterns sung during courtship. It is thought that the red, a sign of maturity, will elicit more patterns than the black beak, which is found in
QUESTIONS AND ANALYSES a) Use appropriate methods to examine the relationship between right heart catheterization (swang1) and 30-day mortality (Death). The methods you use should provide achieve the following analysis goals: Determine if a significant relationship between right heart catheterization and mortality exists. Estimate the risk difference associated with right heart catheterization Estimate the risk in multiplicative terms. Summarize all your findings in regards to these three analysis goals. (10 pts.) b) Now consider adjusting for all of the covariates listed above. Use backward elimination or forward selection (using the default settings in JMP) to develop a logistic regression model that contains the most important covariates along with the right heart catheterization predictor (swang1), then calculate the OR for 30-day mortality associated with the Swan-Ganz right heart catheterization procedure adjusted for the other included covariates. Summarize your findings and be sure to explain how you arrived at your final multiple logistic regression model. (25 pts.) 2 - Effect of Fire on Germination of Banksia Serrata In order for Banksia serrata to germinate, fire is required to open its seed cones. In order to understand the effect of fire on these trees, two neighboring sites were surveyed. Site A has been burned frequently during the last 80 years, while fire at Site B has been infrequent during this same period. It is hypothesized that the different frequency of fire will result in larger median DBH for B. serrata (in cm) at location B than at location A. Perform an appropriate nonparametric test to see if the research hypothesis is supported by the data Site A 12 16 20 26 30 32 36 46 Site B 28 34 44 48 48 50 Summarize the test results and your conclusion. You may use JMP to perform the test or do it “by hand”. (6 pts.) 3 – Beak Color and Length of Song A study of the courtship behavior of domesticated zebra finches is run to determine the effect of beak color in the female on the number of song patterns sung during courtship. It is thought that the red, a sign of maturity, will elicit more patterns than the black beak, which is found in
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