ors identiy уре Ccur aim dally 1ul Il either anti-depressant medication or stress treatment exercises help eliminate these types of headaches and compare four treatments in the experiment: antidepressant alone, placebo alone, antidepressant plus stress management, and placebo plus stress management. 480 subjects diagnosed with "chronic tension-type headaches" by their doctors were first blocked by gender, then blocked by age, and finally randomly assigned to one of the four treatment groups. Four treatment groups are created with various combinations of anti-depressant vs. placebo and stress management or not. 480 subjects were equally divided into four groups allowing for 120 subjects receiving each treatment. Subjects were blocked to reduce the effects of two identified confounding variables: gender and age. Subjects were blocked by gender, then age, but ultimately randomly assigned to one of four treatment groups. :: Comparison :: Random Assignment :: Control :: Replication
ors identiy уре Ccur aim dally 1ul Il either anti-depressant medication or stress treatment exercises help eliminate these types of headaches and compare four treatments in the experiment: antidepressant alone, placebo alone, antidepressant plus stress management, and placebo plus stress management. 480 subjects diagnosed with "chronic tension-type headaches" by their doctors were first blocked by gender, then blocked by age, and finally randomly assigned to one of the four treatment groups. Four treatment groups are created with various combinations of anti-depressant vs. placebo and stress management or not. 480 subjects were equally divided into four groups allowing for 120 subjects receiving each treatment. Subjects were blocked to reduce the effects of two identified confounding variables: gender and age. Subjects were blocked by gender, then age, but ultimately randomly assigned to one of four treatment groups. :: Comparison :: Random Assignment :: Control :: Replication
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
![Doctors identify "chronic tension-type headaches" as headaches that occur almost daily for at least six months. Researchers want to determine if either
anti-depressant medication or stress treatment exercises help eliminate these types of headaches and compare four treatments in the
experiment: antidepressant alone, placebo alone, antidepressant plus stress management, and placebo plus stress management. 480 subjects diagnosed
with "chronic tension-type headaches" by their doctors were first blocked by gender, then blocked by age, and finally randomly assigned to one of the four
treatment groups.
Four treatment groups are created with various
combinations of anti-depressant vs. placebo and stress
management or not.
480 subjects were equally divided into four groups allowing
for 120 subjects receiving each treatment.
Subjects were blocked to reduce the effects of two identified
confounding variables: gender and age.
Subjects were blocked by gender, then age, but ultimately
randomly assigned to one of four treatment groups.
: Comparison
:: Random Assignment
:: Control
: Replication](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcf2dae27-5d56-4b65-958d-fb9ae713adae%2F660103d8-1adf-4801-a0ec-ac9982d9ee41%2Fu7b0ico_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Doctors identify "chronic tension-type headaches" as headaches that occur almost daily for at least six months. Researchers want to determine if either
anti-depressant medication or stress treatment exercises help eliminate these types of headaches and compare four treatments in the
experiment: antidepressant alone, placebo alone, antidepressant plus stress management, and placebo plus stress management. 480 subjects diagnosed
with "chronic tension-type headaches" by their doctors were first blocked by gender, then blocked by age, and finally randomly assigned to one of the four
treatment groups.
Four treatment groups are created with various
combinations of anti-depressant vs. placebo and stress
management or not.
480 subjects were equally divided into four groups allowing
for 120 subjects receiving each treatment.
Subjects were blocked to reduce the effects of two identified
confounding variables: gender and age.
Subjects were blocked by gender, then age, but ultimately
randomly assigned to one of four treatment groups.
: Comparison
:: Random Assignment
:: Control
: Replication
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