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Author Question: In a clinical trial, 780 participants suffering from high blood pressure were randomly assigned to ... (Read 195 times)

javeds

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on: Jul 25, 2018
In a clinical trial, 780 participants suffering from high blood pressure were randomly assigned to one of three groups.
 
  Over a one-month period, the first group received a low dosage of an experimental drug, the second group received a high dosage of the drug, and the third group received a placebo. The diastolic blood pressure of each participant was measured at the beginning and at the end of the period and the change in blood pressure was recorded. Identify the response variable.
  A) The participants in the experiment
  B) Change in diastolic blood pressure
  C) The dosage of the drug
  D) The treatment received (placebo, low dosage, high dosage)

Question 2

In comparing the means of two populations, some methods are based on independent samples and some are based on paired samples. Explain the difference between independent and paired samples. Give an example of each type of sample.
 
  What will be an ideal response?


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Joy Chen

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Reply #1 on: Jul 25, 2018
Answer to Question 1

B

Answer to Question 2

In paired samples, there is a natural pairing of the members of the two populations. In independent samples, no such pairing exists. An example of an independent sample is the income of men and women. An example of a paired sample is the income of husbands and their wives. (Examples will vary.)


javeds

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Reply #2 on: Jul 25, 2018
Thank you!


Joy Chen

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Reply #3 on: Jul 25, 2018
Always glad to help...


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