condition mean min max ZT0-3 514.4 514.4 514.4 ZT4-7 325.87199999999996 325.87199999999996 325.87199999999996 ZT8-11 331.50350000000003 331.50350000000003 331.50350000000003 ZT12-15 475.235 475.235 475.235 ZT16-19 463.782 463.782 463.782 ZT20-23 639.3085 639.3085 639.3085