Skip to content
free
K
1
2
practice
Home
Math
English
Science
Social Studies
Contact
Language
English
Español
Sign In
/
College Test Prep
/
LSAT
/
Control Groups and Confounding Variables
Grade Level
LSAT
LR.086 Control Groups and Confounding Variables
0%
Skill Level
🔴 Hard
00:00
Progress to Next Level
25% to Medium
Easy
Medium
Hard
Mastery
100%
Which experimental design best separates the effect of post-discharge calls from other influences?
A
Compare readmissions after post-discharge calls is introduced with readmissions before it was introduced.
B
Within categories defined by baseline-risk category and diagnosis, randomly assign discharged patients to post-discharge calls or standard written instructions, then compare readmissions using the same measurement rule.
C
Use post-discharge calls only for discharged patients with the most favorable expected results, then compare them with other discharged patients.
D
Ask participants or staff whether post-discharge calls seemed useful, then treat favorable opinions as evidence of the effect.
Submit Answer
