condition mean min max ZT0-3 32.7571997425 17.25113567 48.263263815 ZT4-7 55.843502985 51.80351926 59.88348671 ZT8-11 30.24701123 23.290099385 37.203923075 ZT12-15 32.0126254075 24.736209145 39.28904167 ZT16-19 50.8366877475 45.43058391 56.242791585 ZT20-23 63.02204261 62.72616522 63.31792