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goatMaster goatMaster
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6 years ago
Which example below is not a random assignment to experimental groups?
 
  a. assign numbers to subjects, put corresponding numbers in a hat and pull out numbers, place the first subject in the experimental group and the second subject in the control group, and continue until all numbers are used
  b. ask subjects whether they prefer to be in the experimental group or the control group, and then assign subjects based on their preference
  c. flip a coin, assigning subjects getting a head to the control group and those getting a tail to the experimental group
  d. use a random number generator after assigning numbers to your subjects
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ZoeWarren98ZoeWarren98
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