Which section of the report allows the nurse researcher to address limitations or weaknesses of the study?

Choice A rationale

This hypothesis is directional because it explicitly predicts the nature and path of the outcome. By using the term greater weight loss, it specifies that one group will outperform the other based on the intervention of a supportive telephone call. In directional hypotheses, the researcher commits to a specific expected increase or decrease in the dependent variable. This narrows the focus of the statistical test to one end of the distribution, reflecting a specific clinical expectation.

Choice B rationale

This statement represents a directional hypothesis because it uses the comparative term fewer instances. It predicts that the presence of an infection-control nurse will lead to a specific reduction in the rate of sepsis. Directional hypotheses are often based on existing theory or previous empirical evidence suggesting a particular benefit. By stating that one condition is superior to another in preventing a negative outcome, the researcher provides a clear, biased path for the expected statistical results.

Choice C rationale

This hypothesis is non-directional because it states there will be a difference without specifying the nature, direction, or magnitude of that difference. It does not predict which group will have a more advanced stage of disease; it simply posits that the two groups will not be equal. This approach is used when the researcher lacks sufficient evidence to predict a specific outcome or when the goal is to remain strictly objective about any potential variation discovered.

Choice D rationale

This is a directional hypothesis because it utilizes the evaluative term perform better to describe the expected academic outcome for children receiving counseling. It clearly indicates that the intervention group is expected to have higher achievement scores than the control group. Such hypotheses are common when the researcher is testing the efficacy of a supportive intervention and expects a positive correlation between the treatment and the children's school performance over a one-year period.

Choice A rationale

Feasibility refers to the practical possibility of conducting a study, and a primary constraint is the availability of participants. If the potential subjects represent less than 1 percent of the population, the researcher will likely struggle to recruit a sample large enough to achieve statistical power. Without a sufficient sample size, the study cannot produce valid or generalizable results. This scarcity of subjects makes the study mathematically and logistically difficult to execute within a reasonable timeframe.

Choice B rationale

A high percentage of eligible families in the local region significantly enhances the feasibility of a study. This situation ensures a robust sampling frame, making recruitment more efficient and cost-effective. High participant availability reduces the risk of type II errors by allowing for a larger sample size, which increases the likelihood of detecting a true effect. This factor is a facilitator rather than a negative influence, as it supports the successful completion of data collection.

Choice C rationale

The absence of similar studies over the last 15 years indicates a significant gap in the literature, which actually increases the significance and justification for the research. While it might mean there is less theoretical groundwork to build upon, it does not inherently make the study impossible to perform. A lack of recent research often attracts funding and interest because the findings will provide novel insights into a topic that has been neglected by the scientific community.

Choice D rationale

The inability of children under 5 years old to provide informed consent is a standard ethical consideration in pediatric research, not a feasibility barrier. Researchers address this by obtaining legal permission from parents or guardians and seeking assent from the child when possible. Institutional Review Boards have established protocols for such populations. As long as the ethical protections are in place, the age of the participants does not prevent the study from being conducted or successfully managed.