https://www.youtube.com/watch?v=HLzS5wPqWR0
to understand bonferroni correction, first , we need to understand family-wise error rate,
a1=type one error
FWER=1-(1-a1)^m
m is the number of tests
bonferroni correction
corrected a1
=a1/k
k is the number of tests performed.
FWER=1-(1-a1/k)^k
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