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5 Written questions

5 Multiple choice questions

  1. is one of the contributing factors to sampling error. It is the result of choosing a bad sample. Good methods of sample selection minimize sample bias.
  2. N=n1*n2/k
  3. is an alternative to a census, in which data is collected from only some members of the population.
  4. is a possible contributing cause in a clinical study or trial that
    could produce the same effect as the variable under investigation. A good clinical study or trial attempts to eliminate confounding variables using a control group.
  5. of a quantitative data set is a summary of the center of the data set.
    It is computed by adding the data elements together and dividing by N, the number of
    data elements.

5 True/False questions

  1. Q125/100 * N

          

  2. rangeof a quantitative data set is a summary of the center of the data set.
    It is computed by adding the data elements together and dividing by N, the number of
    data elements.

          

  3. Q375/100 * N

          

  4. simple random samplingis a sampling technique in which every member of the population should have the same (random) chance of being in the sample as any other member of the
    population.

          

  5. double-blind studyis a controlled placebo study in which neither the subjects nor the scientists conducting the study know which subjects are in the treatment group and which are in the control group.

          

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