condition mean min max ZT0-3 34.19623333333333 30.4069 38.5279 ZT4-7 41.74175 41.74175 41.74175 ZT8-11 42.01445 42.01445 42.01445 ZT12-15 56.755624999999995 50.23665 63.2746 ZT16-19 45.39245 45.39245 45.39245 ZT20-23 38.87665 38.87665 38.87665