thresh P-value %words %seq Nwords Nseq total_words total_seq 6.6697 0.0001 2.6% 2.6% 3 3 115 117 5.8996 0.0005 38.3% 37.6% 44 44 115 117 5.1547 0.001 44.3% 43.6% 51 51 115 117