12kingjusglo 12kingjusglo
  • 17-01-2018
  • Physics
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The only type of investigation that involves a control group is

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aksmith813 aksmith813
  • 17-01-2018
experimental? I hope that helps :)
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Ari1208
Ari1208 Ari1208
  • 17-01-2018
An experimental one. Hope this helped.
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