A researcher wanting to explore the lives of women newly ...

[HCHenry]

A researcher wanting to explore the lives of women newly diagnosed with breast cancer obtains a random sample of the population. What part of the study will be strengthened because of the random sample?
 
  a. Feasibility
  b. Reliability
  c. Statistical power
  d. Validity

Question 2

In a study investigating nurses' attitudes toward taking care of respiratory disease patients who had a long history of smoking,
 
  the researcher randomly selected a sample from a list of all the registered nurses from a randomly selected list of four states in the Southeast. Because the sample was drawn randomly, to what population can the findings of the study be generalized? Registered nurses in the:
  a. Selected four states
  b. Southeast
  c. Southeast who are actively working
  d. United States

[olivia_paige29]

Answer to Question 1

ANS: D
Random samples increase the validity of a study.
Feasibility refers to the likelihood that the study will be conducted to its conclusion.
The reliability is the extent to which an instrument will obtain consistent findings.
The power of a study is the probability that a difference that does exist will be detected. It is influenced by sample size, but not necessarily how the sample was created.

Answer to Question 2

ANS: B
This study used a cluster sampling technique that is one type of random sampling plan. The results can be generalized to the population, in this case the Southeast.
The four states were randomly selected from all states in the Southeast, so the findings can be considered representative of the entire Southeast.
The results can be generalized to the entire registered nurse population in the Southeast.
Generalizing findings to all nurses in the country is not technically warranted in this study. The population represented by the sample is only registered nurses in the Southeast.