condition mean min max ZT0-3 38.870999999999995 38.870999999999995 38.870999999999995 ZT4-7 32.15935 32.15935 32.15935 ZT8-11 30.3378 30.3378 30.3378 ZT12-15 33.3162 33.3162 33.3162 ZT16-19 36.4757 36.4757 36.4757 ZT20-23 38.22225 38.22225 38.22225