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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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Nurselady Nurselady
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6 years ago
In evaluating how effective an anti-bullying program in a school is, Iori asks students how many times they have been bullied in the past four months at the beginning and middle of the semester. However, since he did not use a control group, what form of invalidity may be a problem?
 
  a. compensation.
  b. maturation.
  c. statistical regression.
  d. experimental mortality.
  e. causal time order.
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FATTAH K.FATTAH K.
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6 years ago
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Nurselady Author
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#2
6 years ago
Makes more sense now, ty
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#3
4 years ago
k.
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#4
4 years ago
thbak you
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