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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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Paolaemy Paolaemy
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6 years ago
Which factors would be considered threats to internal validity? (Select all that apply.)
 
  a. Time
  b. Selection effects
  c. History
  d. Testing
  e. Subject availability
  f. Cost
  g. Selection bias
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Paolaemy Author
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6 years ago
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