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Fazer teste: Avaliação - Statistics 2

A weight loss program provides three follow-up methods to choose from for individuals who went through the program and reached their desired weight: monthly in-person meeting, monthly on-line meeting, and monthly newsletter by mail. In order to assess the effectiveness of the three follow-up methods, the program selects a random sample of 291 individuals who went through the program and reached their desired weight and classifies them according to the follow-up method that they sign-up for. A year later the study finds that 30% of those who chose to sign up for the in-person follow-up method regained more than 5 pounds, 50% of those who chose to sign-up for the online method regained more than 5 pounds and 70% of those who chose to sign-up for the newsletter method regained more than 5 pounds.


Skill: Identify the design and other features of a study
"multiple choice" question: select the correct answer.
Which of the following is the correct design of this study?

 

A randomized experiment

 

A randomized response study

 

An observational study

 

A randomized observational study

 

A blind observational study


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