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Author Question: A study is an observational study if the investigator observes the behavior of a response variable ... (Read 225 times)

jho37

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on: Jul 24, 2018
A study is an observational study if the investigator observes the behavior of a response variable after one or more factors have been manipulated.
 
 
 
  Indicate whether the statement is true or false

Question 2

A placebo is designed to be identical in appearance to the treatment of interest, but contains no active ingredients.
 
 
 
  Indicate whether the statement is true or false


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succesfull

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Reply #1 on: Jul 24, 2018
Answer to Question 1

F

Answer to Question 2

T


jho37

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Reply 2 on: Jul 24, 2018
Thanks for the timely response, appreciate it

ricroger

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Reply 3 on: Yesterday
Excellent

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