Inferential Statistics PCAD-31 Practice Questions (Page 7)

Questions 31–33

1. 31application · medium

   A hospital administrator wants to model the probability that a patient is readmitted within 30 days of discharge. The outcome is recorded as 'readmitted' or 'not readmitted'. Which modeling approach is most appropriate?

   • ALinear regression with readmission as the outcome and a log transformation of the predictors
   • BBootstrap the data and compute the mean readmission rate
   • CLinear regression with readmission as a 0/1 outcome
   • DLogistic regression with readmission as the outcome
   Reveal Solution Discussion Select an answer first
2. 32foundation · easy

   What is the defining characteristic of bootstrapping when used to estimate the sampling distribution of a statistic?

   • ASplitting the original sample into training and validation subsets to assess variability
   • BResampling the original sample with replacement to create new samples of the same size
   • CDrawing multiple independent samples from the population to approximate the statistic's distribution
   • DResampling without replacement to create smaller samples and measure the statistic's stability
   Reveal Solution Discussion Select an answer first
3. 33foundation · easy

   What does the predicted probability from a logistic regression model represent?

   • AThe odds of the outcome occurring
   • BThe estimated probability that the outcome is in the positive class (e.g., event occurs)
   • CThe log-odds of the outcome occurring
   • DThe classification of the outcome as 0 or 1
   Reveal Solution Discussion Select an answer first