condition mean min max ZT0-3 363.716685 363.716685 363.716685 ZT4-7 437.93858250000005 437.93858250000005 437.93858250000005 ZT8-11 342.8948355 342.8948355 342.8948355 ZT12-15 299.57845050000003 299.57845050000003 299.57845050000003 ZT16-19 165.8178335 165.8178335 165.8178335 ZT20-23 161.78308249999998 161.78308249999998 161.78308249999998