Consider an observational study in which a sample of individuals with a certain condition are compared to a second reference group that do not have the condition. Proportions of individuals with risk factor in each group can then be compared.
(a) This type of study is called a(n) _______ - _______ study.
(b) With this type of data we can do a(n) _______ - _______ analysis, but not a(n) _______ - _______ .

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The Answer of Consider an observational study in which a sample of individuals with a certain condition are compared to a second reference group that do not have the condition. Proportions of individuals with risk factor in each group can then be compared.
(a) This type of study is called a(n) _______ - _______ study.
(b) With this type of data we can do a(n) _______ - _______ analysis, but not a(n) _______ - _______ .

Consider an Observational Study in Which a Sample of Individuals