A study used logistic regression to determine char...
A study used logistic regression to determine characteristics associated with Y =whether a cancer patient achieved remission (1=yes). The most important explanatory variable was a labeling index (LI) that measures proliferative activity of cells after a patient receives an injection of tritiated thymidine. It represents the percentage of cells that are “labeled.” The first table shows the grouped data. Software reports the second table for a logistic regression model using LI to predicta. Conduct a Wald test for the LI effect. Interpret. b. Construct a Wald confidence interval for the odds ratio corresponding to a 1-unit increase in LI. Interpret. c. Conduct a likelihood-ratio test for the LI effect. Interpret. d. Construct the likelihood-ratio confidence interval for the odds ratio. Interpret.