condition mean min max ZT0-3 2938.55 2938.55 2938.55 ZT4-7 2119.4 2119.4 2119.4 ZT8-11 3423.6499999999996 3423.6499999999996 3423.6499999999996 ZT12-15 4382.950000000001 4382.950000000001 4382.950000000001 ZT16-19 4004.8 4004.8 4004.8 ZT20-23 3165.2 3165.2 3165.2