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Author Question: A study is an observational study if the investigator observes the behavior of a response variable ... (Read 270 times)

jho37

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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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Answer to Question 1

F

Answer to Question 2

T




jho37

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Reply 2 on: Jul 24, 2018
Excellent


scikid

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Reply 3 on: Yesterday
Gracias!

 

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