15b. 75%c. 20%d. 15%Response Feedback: Sample attrition rate formula = number subjects withdrawing ÷ sample size ´ 100%.For example, if a study had a sample size of 160 and 40
people withdrew from the study, the attrition rate would be 25%.p. 335Question 17 A researcher develops a new instrument to measure coping skills and conducts a pilot study to compare the new tool with an existing tool that measures this concept. This is an example of evidence of validity from:Answers: a. Convergent validityb. Divergent valityc. Readabilityd. Contrasting groupsResponse Feedback:page 382Question 18 “To be considered eligible for the study, subjects had to be older than 21 years of age, hold a valid state driver’s license, and be able to fire a shotgun.” This is an example of which of the following?
Answers: a. Population elementb. Sampling criteriac. Representativenessd. Exclusion planResponse Feedback: Sampling criteria, also referred to as eligibility criteria or inclusion criteria, include a list of characteristics essential for membership or eligibility in the target population. The criteria are developed from the research problem, the purpose, a review of literature, the conceptual and operational definitions of the study variables, and the design. The sampling criteria determine the target population, and the sample is selected from the accessible population within the target populationp 330Question 19 Using a table of random numbers, the sample of 400 subjects was selected from the list of the license numbers of all registered nurses in the state of Michigan. Each nurse was sent a letter requesting completion of an online survey on workplace bullying. This is anexample of what type of sampling method?Answers: a. Purposive samplingb.
Simple random samplingc. Quota samplingd. Convenience samplingResponse Feedback: To achieve simple random sampling, elements are selected at random from the sampling frame. This goal can be accomplished in a variety of ways, limited only by the imagination of the researcher. A random number table is effective in selecting numbered elements from a master list. Simple random sampling ensures that each element of the populationhas an equal and independent chance of being chosen.p. 338Question 20 An outpatient being treated in the infusion center for thalassemia is asked to fill out a form about satisfaction with the center, while he waits for his appointment. The form consists of five questions, each a statement, with six possibilities after it: Strongly Agree, Agree, Slightly Agree, Slightly Disagree, Disagree, and Strongly Disagree. This is an example of which of the following? Answers: a. A semantic differential scaleb. A paper interviewc.
A questionnaired. A Likert scaleResponse Feedback: A Likert scale determines the opinion or attitude of a subject and contains a number of declarative statements with a scale after each statement. The Likert scale is the most commonly used of the scaling techniques in nursing and health care studies. Response choices in a Likert scale most commonly address agreement, evaluation, or frequency. Agreement options may include statements such as strongly agree, agree, uncertain, disagree, and strongly disagree.p. 411
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- Fall '16
- Denise Cauble
- Nursing, researcher