One of the treatments should be a control treatment

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Unformatted text preview: true. Experimental Design observa<onal study e.g.: tally prevalence of limb deformi8es in the wild in regions that differ in the levels of the independent variable (such as pollutant levels or exposure to UV light). If your hypothesis is true, then limb deformi8es (dependent variable) are more prevalent in areas with higher exposure to the independent variable. manipula<ve experiment We control the independent variable and can set it at different levels in different treatments, while keeping all other environmental variables constant. One of the treatments should be a control treatment that is iden8cal to all other treatments, except our independent variable is set to zero. The Life Cycle of Ribeiroia Results of an observational study You can conclude that: (A) The parasite is responsible for limb deformi8es (B) The results are consistent with parasites causing deformi8es (C) The results are NOT consistent with parasites causing deformi8es (D) Para...
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This note was uploaded on 01/30/2014 for the course IB 105 taught by Professor Caceres during the Fall '08 term at University of Illinois, Urbana Champaign.

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