For each of the following cases (a and b), (i) state whether the study should be observational
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(i) state whether the study should be observational or experimental and why.
(ii) state whether blinding should be used. If the study should be run blind or double-blind, who should be blinded and why?
(a) An investigation of whether taking an aspirin every day decreases the chance of having a stroke.
(b) An investigation of whether attending religious services regularly reduces blood pressure.
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a i This should be an experiment so that we can control for confounding variables For example it mig...View the full answer
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Related Book For
Statistics For The Life Sciences
ISBN: 9780321989581
5th Edition
Authors: Myra Samuels, Jeffrey Witmer, Andrew Schaffner
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