Example: biology
Multiple groups and comparisons
between groups, i.e. how they differ from the overall mean of 24.3 • Both samples have the same differences between group (A, B or C) means – we can say variation between means in each data set is the same • But the variability within a sample in each set is different. Set 1 is tighter around its mean (lower SDs) than set 2.
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UKALL14 - Protocol - v4.0 -24apr12 Page 2 of 127
www.ctc.ucl.ac.ukUKALL14 - Protocol - v4.0 -24apr12 Page 3 of 127 Coordinating Centre: For general queries, supply of trial documentation and collection of data:
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