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please read the article https://bmjopen.bmj.com/content/bmjopen/10/9/e042045.full.pdf and asnwer the below questions What is the topic of this study? What is/are the variable(s) of the data? What

please read the article

https://bmjopen.bmj.com/content/bmjopen/10/9/e042045.full.pdf

and asnwer the below questions

  • What is the topic of this study?
  • What is/are the variable(s) of the data?
  • What is the sample size?
  • What is the method of sampling?
  • What are the null and alternative hypotheses?

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