Probability sample DECRESASES bias Systematic variation causes bias What are

# Probability sample decresases bias systematic

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(because it introduces bias)? Probability sample DECRESASES bias. Systematic variation causes bias What are the acceptance and refusal rates in a study? Refusal rate: The percentage of subjects who declined to participate in the study and the subjects reason for not participating. Acceptance rate: The percentage of subjects meeting sampling criteria consenting to participate in a study. How do you calculate them? Do all studies publish this information? In studies with a high acceptance rate or a low refusal rate, the chance for ___________ ____________ is less, and the sample is more likely to be representative of the target population (which is very desirable in research). What are sample attrition and retention rates? (Make sure you understand how this differs from inclusion / exclusion and acceptance / refusal.) In studies with a high retention rate, the chance for ___________ ____________ is less, and the sample is more likely to be representative of the target population (which is very desirable in research). Probability sampling methods are designed to increase _________________ and decrease ________________ or ______________. Define probability sampling: Give a simple definition and an example of simple random, stratified random, cluster, and systematic probability sampling strategies. Describe non-probability sampling. Describe these types of non-probability sampling plans used most frequently in nursing: o Convenience sampling: sing students that only come in one door of a building o Quota sampling: sample of different ethnic groups, or who drive different cars. The adequacy of a sample size in quantitative studies is evaluated using a _____ power analysis . Briefly describe what this is based on your textbook. The effect is the presence of the phenomena examined in a study. o What is the definition of the effect size? o The statistical test tells you _____________________, but the effect size tells you the size of the _______________________________ or the strength of the relationship ___________________________ . o If you increase the sample size, you potentially ___________ the effect size. Descriptive and correlational studies often require very large samples, but quasi-experimental and experimental studies often use smaller samples? Using the information on p 267, explain briefly why this is so. Describe purposeful (or purposive) sampling and network (or snowball) sampling techniques used in qualitative research. In qualitative research, the focus is on the quality of information obtained from the subject(s) rather than the sample size. How does the scope of the study affect sample size in qualitative research? What does “saturation of information” and “verification” mean? ©2015 UTA School of Nursing 2
Define “research setting”. How is a setting selected in quantitative and qualitative research? What are the three types of settings typically found in research and how do they differ in control? Chapter Ten: Clarifying Measurement and Data Collection in Quantitative Research Chapter Ten introduces some useful concepts to you about measurement and data collection. Although sometimes the concepts may seem deep (and even daunting), take the time to understand what your text is trying to tell you.

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• Fall '16
• Denise Cauble
• Nursing, target population, UTA School of Nursing, UTA School