Twenty-five patients at a large clinic volunteer to participate in a study regar
ID: 3158465 • Letter: T
Question
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 x-bar = 4500 g over two weeks. Suppose we know that the standard deviation of the population of weight changes on this particular diet is = 100 g.
The results of the study were widely critiqued. The researchers could have improved the quality of their research by
running the study for longer than two weeks.
not using a volunteer sample.
sampling fewer people to reduce variability.
None of the above,
running the study for longer than two weeks.
not using a volunteer sample.
sampling fewer people to reduce variability.
None of the above,
Explanation / Answer
None of the above.
The test statistic is not dependent on time hene 1 is not the answer
volunteer sample reduces the bias
sampling less increases variable as variation is invesely proportional to sample size
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