condition mean min max ZT0-3 42.4413 11.952549999999999 96.10589999999999 ZT4-7 58.54845 58.54845 58.54845 ZT8-11 44.678399999999996 44.678399999999996 44.678399999999996 ZT12-15 30.407475 30.243850000000002 30.5711 ZT16-19 7.288665 7.288665 7.288665 ZT20-23 6.92222 6.92222 6.92222