condition mean min max ZT0-3 48.11143333333333 20.13655 69.47725 ZT4-7 19.04795 19.04795 19.04795 ZT8-11 19.10915 19.10915 19.10915 ZT12-15 32.3551 28.59905 36.11115 ZT16-19 45.68865 45.68865 45.68865 ZT20-23 76.72045 76.72045 76.72045