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Per-comparison error rate
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<p>In <a href="/facts/Statistics/DNPsKGYU">statistics</a>, per-comparison error rate (PCER) is the probability of a <a href="/facts/Type_I_error/aazbF3fq">Type I error</a> in the absence of any <a href="/facts/Multiple_comparisons/lAItaL18">multiple hypothesis testing</a> correction. This is a liberal error rate relative to the <a href="/facts/False_discovery_rate/NqyJxV8s">false discovery rate</a> and <a href="/facts/Family-wise_error_rate/uXA5VVgH">family-wise error rate</a>, in that it is always less than or equal to those rates. </p>