When you have one experiment comparing 5 groups, you could compare each pair of groups with multiple t- tests. Why is this a bad idea?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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When you have one experiment comparing 5 groups, you could compare each pair of groups with multiple t-
tests. Why is this a bad idea?
a) Multiple t-tests would require too many subjects
b) Multiple t-tests would cause type I error inflation
c) Multiple t-tests would cause reduced power
d) T-tests can’t compare pairs of means



DRUG DOSE 1         DRUG DOSE 2          DRUG DOSE 3
5                                      9                                 12
7                                     11                                14
8                                      9                                 10
6                                     12                                13 

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