condition mean min max ZT0-3 100.41761666666666 54.71535 123.52 ZT4-7 40.0745 40.0745 40.0745 ZT8-11 30.6045 30.6045 30.6045 ZT12-15 43.511224999999996 34.2585 52.76395 ZT16-19 58.869249999999994 58.869249999999994 58.869249999999994 ZT20-23 105.51050000000001 105.51050000000001 105.51050000000001