Which hypothesis is nondirectional?
A) Hospitals with an infection-control nurse will have fewer instances of sepsis among inpatients than hospitals without an infection-control nurse.
B) There will be a greater weight loss among dieting patients who receive a weekly supportive telephone call from a dietitian than among dieting patients who do not receive a weekly supportive phone call.
C) There will be a difference in stage of disease for prostate cancer among men who had an abnormal prostate-specific antigen screening compared with men who had an abnormal digital rectal examination screening.
D) Children who receive weekly counseling for 1 year after the death of a parent will perform better in school than children who do not receive weekly counseling after the death of a parent.

Question

Quizplus · Accepted Answer

A nondirectional hypothesis states that a difference exists between two groups, but does not make a prediction about the direction of the difference. In this case, "there will be a difference in stage of disease for prostate cancer among men who had an abnormal prostate-specific antigen screening compared with men who had an abnormal digital rectal examination screening" is a nondirectional hypothesis as it only states that a difference exists and does not predict which group will have a more advanced stage of disease.

Which Hypothesis Is Nondirectional