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5 Written questions

5 Multiple choice questions

  1. for a data set consists of the minimum value in the data set
    Min, the fi rst quartile Q1, the median M = Q2, the third quartile Q3, and the maximum value Max.
  2. is an alternative to a census, in which data is collected from only some members of the population.
  3. is 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
  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. is an extreme data point that does not t into the overall pattern of the rest of the data.

5 True/False questions

  1. quantitative variableis a variable which represents a measurable quantity,
    one which can be represented by a number.


  2. meanof 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. Q125/100 * N


  4. interquartile rangeMax-min


  5. rangeMax-min