condition mean min max ZT0-3 23.89125 23.89125 23.89125 ZT4-7 20.8146 20.8146 20.8146 ZT8-11 20.188200000000002 20.188200000000002 20.188200000000002 ZT12-15 17.44 17.44 17.44 ZT16-19 18.88215 18.88215 18.88215 ZT20-23 20.4651 20.4651 20.4651