condition mean min max ZT0-3 6.9634763785 3.785925766 10.141026991 ZT4-7 8.570582037249999 7.876086604999999 9.2650774695 ZT8-11 18.169796712500002 13.22818431 23.111409115 ZT12-15 25.1226233425 23.8243892 26.420857485 ZT16-19 19.9831999075 17.70569282 22.260706995 ZT20-23 33.734124460000004 30.618452400000002 36.84979652