Dr. Harmon expected that her neurotic patients would come significantly earlier to all scheduled appointments compared to other patients, and planned to run a one-tailed test to see if their arrival times were much earlier. Unfortunately, she found the opposite result: the neurotic patients came to appointments later than other patients. What can Dr. Harmon conclude from her one-tailed test?
A) Neurotic patients came to appointments significantly later than other patients.
B) Neurotic patients came to appointments significantly earlier than other patients.
C) Non-neurotic patients came to appointments significantly earlier than neurotic patients.
D) Neurotic patients did not come to appointments significantly earlier than other patients.

Question

Quizplus · Accepted Answer

A one-tailed test is designed to detect an effect in one direction. Since Dr. Harmon's hypothesis was that neurotic patients would arrive significantly earlier, finding that they arrived later means she cannot conclude they arrive significantly later based on her one-tailed test setup. The correct conclusion is that her hypothesis was not supported; she cannot conclude they come significantly earlier.

Dr Harmon Expected That Her Neurotic Patients Would Come Significantly