condition mean min max ZT0-3 0.11364175174999999 0.018602705 0.2086807985 ZT4-7 0.38182832275 0.3740347115 0.389621934 ZT8-11 0.904685352 0.6703637135 1.1390069905 ZT12-15 1.49958414825 1.1491298655 1.8500384310000002 ZT16-19 1.1664071635000002 1.0328676505 1.2999466765 ZT20-23 1.9230687335 1.824958097 2.02117937