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Title: Would an observational study or an experiment be more appropriate to investigate Post by: ryobu on Sep 27, 2015 Would an observational study or an experiment be more appropriate to investigate the effects on humans of a substance known to be toxic? Explain.
Title: Re: Would an observational study or an experiment be more appropriate to investigate Post by: bio_man on Oct 5, 2015 Content hidden
Title: Re: Would an observational study or an experiment be more appropriate to investigate Post by: ryobu on Oct 10, 2015 Thank you for helping me out. Because of you, I got it right.
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