accessible to the researcher is referred to as the: A. Population B. Sample C. Subjects D. Sampling frame 3. The only way to be sure that a sample represents a population is if it incorporates the following two essential criteria: A. Random selection and independence B. Random selection and dependence C. Purposive selection and independence D. Purposive selection and dependence 4. Selection bias may occur under all the following conditions except: A. Sample is not representative of the population B. Numbers in the sample are adequate C. Researcher is able to influence selection or assignment of subjects D. Ease of recruitment skews subject characteristics 5. The measurement of the magnitude of the impact of an intervention is referred to as the: A. Power analysis B. Test of fit C. Effect size D. Factor analysis 6. What is the primary difference between ecological validity and population validity? A. In ecological validity research findings can be generalized to other settings, while in population validity findings can be generalized to other subjects B. In ecological validity research findings can be generalized to other subjects, while in population validity findings can be generalized to other settings C. In ecological validity research findings can be generalized to other disciplines, while in population validity findings can be generalized to other sciences D. In ecological validity research findings can be generalized to other sciences, while in population validity findings can be generalized to other disciplines 7. Sampling techniques used in qualitative research include all except: A. Calculation of power B. Determination of effect size C. Achieving saturation D. Selection of a predetermined percentage of the population 8. The selection of a sample based on subjects who are accessible to the researcher is called: A. Simple random sampling B. Convenience sampling C. Cluster random sampling D. Snowball sampling 9. Methods to reduce subject attrition in research studies include all of the following except: A. Keeping data collection procedures simple B. Minimizing hassle and inconvenience C. Designing complex collection methods D. Using multiple reminder methods 10. The major entity or subject (do we want to clarify this is not a person?) that will be analyzed in the study is called the: A. Population B. Subject C. Sample D. Unit of analysis
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