condition mean min max ZT0-3 36.9116 24.3504 43.48295 ZT4-7 23.68025 23.68025 23.68025 ZT8-11 20.07105 20.07105 20.07105 ZT12-15 32.030300000000004 28.98855 35.072050000000004 ZT16-19 33.2501 33.2501 33.2501 ZT20-23 45.961200000000005 45.961200000000005 45.961200000000005