condition mean min max ZT0-3 769.2882999999999 769.2882999999999 769.2882999999999 ZT4-7 439.1153 439.1153 439.1153 ZT8-11 476.40500000000003 476.40500000000003 476.40500000000003 ZT12-15 544.2049000000001 544.2049000000001 544.2049000000001 ZT16-19 1266.3337999999999 1266.3337999999999 1266.3337999999999 ZT20-23 1546.8766666666668 1546.8766666666668 1546.8766666666668