The nurse has identified a patient situation that may be an area ...

[appyboo]

The nurse has identified a patient situation that may be an area for study. The initial review of the literature helps the investigator to identify what?
 
  a. The number of subjects required for the study
  b. The appropriate statistical tests to analyze the data
  c. The need to extend knowledge in a particular area
  d. The instruments needed to collect data during the study

Question 2

Which hypothesis would be classified as a statistical hypothesis?
 
  a. Oxygen inhalation at 2 L/min by nasal catheter will decrease oral temperature measured with an electronic thermometer.
  b. Oxygen inhalation at 2 L/min by nasal catheter will not affect oral temperature measured with an electronic thermometer.
  c. There will be a greater decrease in anxiety scores in patients receiving informational videos before open heart surgery than in patients who receive standard written information.
  d. There will be a difference in anxiety scores in patients receiving informational videos before open heart surgery and patients who receive standard written information.

[aidanmbrowne]

Answer to Question 1

ANS: C

Feedback
A The number of subjects needed for a study is part of methodology, determined after the research question and hypotheses are determined.
B Statistical tests are part of methodology, determined after the research question and hypotheses are determined.
C The initial literature review helps further define the research question by identifying gaps in the literature, the need for replication of prior research, or the need to extend the knowledge base in a particular research area. It also identifies variables essential to consider in refining the research question.
D The instruments to be used in the study part of methodology, determined after the research question and hypotheses are determined.

Answer to Question 2

ANS: B

Feedback
A This hypothesis is a directional hypothesis rather than a statistical (null) hypothesis.
B A statistical (or null) hypothesis indicates no relationship between variables, as represented in this statement. If in the statistical analysis, a significant relationship is found, the null hypothesis would be rejected.
C This hypothesis is a directional hypothesis rather than a statistical (null) hypothesis.
D This hypothesis is a nondirectional hypothesis rather than a statistical (null) hypothesis.