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. 2008 Sep 12;74(21):6483–6494. doi: 10.1128/AEM.01129-08

TABLE 3.

Mann-Whitney U test comparisons of lot size, prevalence, mean contamination, and maximum contamination results for product lots with and without alleles observed in isolates from humans for fresh and frozen retail product lotsa

Product state P
Lot size Prevalence Mean contamination Maximum contamination
Fresh 0.2946 0.0708 0.0009 0.0233
Frozen 0.4168 0.0005 <0.0001 0.0002
a

Because this test was performed a posteriori, the critical value (α) is 0.025.