Suppose an observational study that compares two groups (group 1 and group 2) has sample means 1
Question:
(i) We have evidence that the difference in sample means is unlikely to arise by chance.
(ii) The difference between the two sample means is important.
(iii) The data show that being in group 1 causes the mean to go up.
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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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