What kind of study is this? A. An observational study. B. An experiment. C. None of the above. Part II
What sampling method was employed in selecting the 17500 patients? A. Systematic sampling. B. Stratified random sampling. C. Multistage sampling. D. Simple random sampling. Part III
Which of the following is the population of interest to the study investigator? Choose the most appropriate answer. A. The 35 Texas hospitals that were selected in the study. B. All hospitals in Texas. C. The 17500 patients whose medical records were retrieved in the study. D. All patients who were admitted to the 35 selected hospitals in Texas. Part IV
Which of the following statements is correct about the average patient death rate of the 26 hospitals in which health care information is gathered and stored on computers? A. It is a parameter. B. It is a variable of interest. C. It is a statistic.
Part V
What graphical display is appropriate for comparing the distribution of patient death rates between hospitals that use computer systems and those that rely on the 'paper' system? A. A bar chart. B. Side-by-side boxplots. C. A scatterplot. D. A stem-and-leaf display.
Part VI
Mr. Prudence read about the study results and concluded from there that hospitals should adopt computerized automation of notes and records because it increases patients chance of survival. Which of the following is a correct statement about the conclusion of Mr. Prudence? A. It is a valid conclusion because the study was based on a very large number of patients. B. It is a valid conclusion because the study results showed that hospitals which use computerized systems have a lower patient death rate. C. It is an invalid conclusion because this study does not necessarily prove a causal relationship between the use of computerized system and hospital mortality. D. Both A) and B).
You can earn partial credit on this problem.