condition mean min max ZT0-3 32.650616666666664 29.059350000000002 37.91225 ZT4-7 40.13725 40.13725 40.13725 ZT8-11 36.93555 36.93555 36.93555 ZT12-15 27.656950000000002 27.50685 27.80705 ZT16-19 22.99165 22.99165 22.99165 ZT20-23 24.3846 24.3846 24.3846