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twenty-five patients at a large clinic volunteer to participate in a study regarding weight loss. these 25 patients had a mean weight loss score of over two weeks. suppose we know that the standard deviation of the population of weight changes on this particular diet is . the results of this study were widely critiqued. the researchers could have improved the quality of their research by

Respuesta :

The correct option regarding how the researchers could have improved the quality of their research is:

Not using a volunteer sample.

What is volunteer sampling and what is it's drawback?

Volunteer sampling is a sampling technique in which each participant in the sample opts to join the research, as is the case for this problem, as each participant opted to join the weight loss project.

The drawback of this type of sampling is that it should contain lots of participants that share similar characteristics, such as desiring to lose weight, or taking the program "seriously", not cheating on the diet, hence it is not expected to be representative of the population.

Thus, to improve the quality of the research, a different strategy of sampling should be chosen.

Missing Information

The options are given as follows:

  • running the study for longer than two weeks.
  • not using a volunteer sample.
  • sampling fewer people to reduce variability.
  • None of the above.

More can be used about volunteer sampling at https://brainly.com/question/13298621

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