condition mean min max ZT0-3 1536.2725 1430.66 1641.885 ZT4-7 1698.655 1698.655 1698.655 ZT8-11 1158.185 1158.185 1158.185 ZT12-15 0 0 0 ZT16-19 1041.3049999999998 1041.3049999999998 1041.3049999999998 ZT20-23 1474.68 1474.68 1474.68