Exam 9: Examining Populations and Samples in Research

A researcher enters a list of subject from a sampling frame into a computer and the computer randomly assigns subjects to control or treatment groups.This is an example of:

The benefit to using a sample that utilizesnarrow sampling criteria is that there is increased:

A nurse conducts a study to examine the effects of a new intervention on FEV1 levels in patients with COPD and uses all patients admitted to a hospital during a 2-month period.This is an example of which type of sampling method?

During the data collection phase of a qualitative study,the researcher notes previously untheorized links among concepts.The researcher will continue to collect data until:

Which is a type of nonprobability sampling?

A researcher conducting a qualitative study knows that saturation of information has occurred when:

A nurse researcher compares the outcomes of administration of a bronchodilator either via nebulizer or by metered-dose inhaler and collects data on subjects in a pediatric inpatient hospital unit.This is an example of which type of setting?

A researcher wishes to identify all school-age children who have type 2 diabetes mellitus in a local community in order to develop a sampling methodology for a study of this population.Which might serve as a barrier to obtaining this information?

Which of the following is true about convenience sampling?

A researcher uses a sample whose members have characteristics similar to those of the population from which it is drawn.This is an example of a:

A researcher wishes to examine whether a teaching program for parents increases adherence to a drug regimen among children with seizure disorders.A convenience sample of children in a large teaching hospital is proposed.In order to prevent confounding of the results by socioeconomic status and type of health insurance,the researcher will utilize which additional sampling technique?

A researcher wishes to evaluate the management of chemotherapy side effects in children with acute lymphocytic leukemia (ALL).Children with ALL are an example of which of the following?

A researcher tests a measurement tool in a pilot study and notes a wide variance in scores.To improve the significance of the study's findings in subsequent studies,the researcher will:

When conducting a study in which it is not possible to determine the true number of subjects who meet eligibility criteria and obtaining a random sample would be time consuming and expensive,the researcher will use which sampling method?

A researcher conducts a survey of patients seen in an inner-city ambulatory clinic to determine barriers to receiving health care.The target population includes African-American,Hispanic,and Somali immigrant patients,as well as a variety of foreign-born students from a nearby university.The researcher chooses subjects from the African-American,Hispanic,and Somali immigrant populations to participate.This is which type of sampling?

Prior to initiating a research study,a researcher conducts a power analysis to determine the sample size necessary for a power level of 0.8 and an alpha of .05.The researcher will:

The goal of appropriate sampling in research is to:

In a study investigating type 2 diabetic patients' ability to make lifestyle changes,the researcher randomly selects a sample from a list of all patients diagnosed with type 2 diabetes in the United States.The researcher also selects the sample by randomly selecting patients diagnosed for 3 years or longer and those who are newly diagnosed.What sampling technique is used in this study?

In a qualitative study,a sample may be too small if:

A researcher wishes to conduct a study to determine the effects of an intervention on high school students.In this study,high school students represent the: