condition mean min max ZT0-3 3534.75 3534.75 3534.75 ZT4-7 3774.6 3774.6 3774.6 ZT8-11 3191.6499999999996 3191.6499999999996 3191.6499999999996 ZT12-15 3053.45 3053.45 3053.45 ZT16-19 3317.2 3317.2 3317.2 ZT20-23 3361.65 3361.65 3361.65