In a clinic, 50 patients with sleep disorders are randomly assigned to one of two different groups. Patients in one group are given medication before bedtime. Patients in the other group are given blindfolds and played soft music at bedtime. Each pa- tient is attached to a machine that records breathing patterns. From the patterns, it is possible to determine whether the patient is awake or asleep. The data will be used to decide which method is more effective in helping patients with sleep disorders. Which of the following statements is correct in the context of this experiment?
A.
It is not possible for this experiment to be single-blind or double-blind, because human subjects are involved.
B.
This is only a single-blind experiment because the experimenters did not include a control group that received neither medication nor a blindfold and soft music.
C.
This is only a single-blind experiment because patients will know which treatment they are receiving, although the examining doctor might not.
D.
This is a double-blind experiment because the experimenters could prevent both groups of patients from knowing what sort of treatment the other group is receiving.
E.
This is a double-blind experiment because the patients were divided into the two treatment groups randomly.
Exam No：AP Statistics Problem Set 11 Year：2024 Question No：36
Answer:
C
Knowledge points:
3.5 Introduction to Experimental Design
3.6 Selecting an Experimental Design
3.7 Inference and Experiments
Solution:
Download APP for more features
1. Tons of answers.
2. Smarter Al tools enhance your learning journey.
IOS
Download
Download
Android
Download
Download
Google Play
Download
Download