condition mean min max ZT0-3 3796.65 3796.65 3796.65 ZT4-7 3751.2 3751.2 3751.2 ZT8-11 3475.3999999999996 3475.3999999999996 3475.3999999999996 ZT12-15 3221.15 3221.15 3221.15 ZT16-19 3505.7 3505.7 3505.7 ZT20-23 4008.95 4008.95 4008.95