condition mean min max ZT0-3 2099.15 2099.15 2099.15 ZT4-7 2649.1 2649.1 2649.1 ZT8-11 1983.4 1983.4 1983.4 ZT12-15 2261.55 2261.55 2261.55 ZT16-19 2234.1499999999996 2234.1499999999996 2234.1499999999996 ZT20-23 1996.6999999999998 1996.6999999999998 1996.6999999999998