condition mean min max ZT0-3 38.128299999999996 38.128299999999996 38.128299999999996 ZT4-7 23.84775 23.84775 23.84775 ZT8-11 21.40565 21.40565 21.40565 ZT12-15 31.6811 31.6811 31.6811 ZT16-19 37.3445 37.3445 37.3445 ZT20-23 44.69145 44.69145 44.69145