Case Study 4 A researcher conducted an

Case Study 4 A researcher conducted an experimental study where one group of patients was given a new drug for hypertension and another group was given a commonly used diuretic. The blood pressures of both groups were measured at the same times each day for a week. 29. What was the researcher’s intervention in this study? a. the timing of blood pressure measurements b. the type of drug given c. having 2 groups of subjects d. all of the above 30. To assign patients to a study group, a number was pulled from a hat by the nurse admitting the patient. An odd number meant that the patient was assigned to the group that received the new drug; an even number assigned the patient to the group that received the commonly used diuretic. This method of sample selection is: a. simple random selection b. stratified random selection c. cluster sampling d. systematic sampling 31. Which type of design is this? a. descriptive b. correlational c. quasi-experimental d. experimental e. phenomenological f. ethnography g. historical h. grounded theory 32. Which type of design is this? a. cross-sectional b. longitudinal c. retrospective 33. Identify the independent variable a. blood pressure b. type of drug c. timing of blood pressure 34. What level of measurement is the independent variable? a. nominal b. ordinal c. interval d. ratio 35. Identify the dependent variable. a. blood pressure b. type of drug c. timing of blood pressure 36. What level of measurement is the dependent variable? a. nominal b. ordinal c. interval d. ratio 37. What method of analysis did this researcher use? a. t test b. chi square c. Man Whitney U d. ANOVA 38. The groups were found to be different with a p value of 0.03. If the level of significance had been set at 0.05, was the difference statistically different? a. yes b. no 39. The power of the study was found to be 0.85. Was the sample size large enough? a. yes b. no 40. If the researcher accepted the research hypothesis and rejected the null, what Type of error could the researcher be making? a. Type 1 b. Type 2 41. What could the researcher have done to prevent making a Type I error? (answer all that apply) a. Make the level of significance 0.01 b. Make the level of significance 0.10 c. Increase the sample size d. Increase the power 42. What could the researcher have done to prevent making a Type 2 error? (answer all that apply) a. Make the level of significance 0.01 b. Make the level of significance 0.10 c. Increase the sample size d. Increase the power 43. The researcher did not tell the subjects that they had a right to refuse to participate in the study. Which right was violated? a. self-determination b. protection from harm c. fair treatment d. no human right was violated 44. Who is legally responsible for enforcing the rights of human subjects in this study? a. the researcher and the hospital’s IRB b. the medical director and the hospital’s IRB c. the IRB and the hospital administrator d. all of the above 45. If the dependent variable of this study had had a smaller effect size, what would have been indicated? a. a larger sample size b. a smaller sample size Case Study 5 Two classes take the same research final examination. The mean of one class is 80(8) and the mean of the other is 85(13). 46. What is true about these scores? a. The highest grades between the 2 groups were most likely in the class with a mean of 85. b. The lowest score of either class is 75. c. All students in the class with the higher average did better on the exam. d. The class with the mean of 80 had more A’s. 47. What type of measure is the final examination? a. direct b. indirect 48. The instructor wants to know if the mean scores from the two classes are statistically different and set a level of significance of 0.05 (p = 0.05) to compare them. Findings indicated a p value of 0.10. How would you interpret this finding? a. There was less difference that the researcher was looking for. b. There was a lower degree of sameness among the subjects than the researcher was looking for. c. This level of significance indicated that the two classes were different. 49. The test had 150 questions on it. What is true about sample sizes when there are more variables being tested? a. The more variables a study has the fewer the subjects needed. b. The more variables a study has the more subjects that are needed. 50. What level of measurement is the dependent variable of this study? a. nominal b. ordinal c. interval d. ratio SCIENCE HEALTH SCIENCE NURSING NUR 5005

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