condition mean min max ZT0-3 0.18843109700000002 0.07154029 0.30532190400000003 ZT4-7 0.56934963225 0.521204541 0.6174947234999999 ZT8-11 0.7738005735 0.6649594914999999 0.8826416555000001 ZT12-15 0.81613422475 0.8099713019999999 0.8222971475 ZT16-19 0.5842593865000001 0.5564040935 0.6121146795000001 ZT20-23 0.8338625957500001 0.8159887375000001 0.8517364540000001