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5 Written questions

5 Multiple choice questions

  1. 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
    population.
  2. 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.
  3. for a data set is the difference between the third quartile and the
    fi rst quartile: Q3 Q1.
  4. N=n1*n2/k
  5. 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.

5 True/False questions

  1. surveyis an alternative to a census, in which data is collected from only some members of the population.

          

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

          

  3. 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.

          

  4. double-blind studyis 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.

          

  5. confounding variableis 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.