condition mean min max ZT0-3 129.32276320000003 118.31489750000001 140.33062890000002 ZT4-7 92.829128075 83.429880545 102.228375605 ZT8-11 62.435534659999995 60.318085554999996 64.552983765 ZT12-15 40.322963105 32.964925795 47.681000415 ZT16-19 28.032797455 27.6368185 28.428776409999998 ZT20-23 26.72365152 23.285131115 30.162171925000003