ju5lekshiasimm ju5lekshiasimm
  • 20-01-2017
  • Chemistry
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Why is a control needed in a valid experiment?

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damselflypc
damselflypc damselflypc
  • 20-01-2017
You need a control so you have something to compare the experimental group on-- If you don't have a control group, how will you know what's changed?
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