condition mean min max ZT0-3 45.99535 45.99535 45.99535 ZT4-7 62.045100000000005 62.045100000000005 62.045100000000005 ZT8-11 27.272399999999998 27.272399999999998 27.272399999999998 ZT12-15 15.8402 15.8402 15.8402 ZT16-19 22.43565 22.43565 22.43565 ZT20-23 36.44135 36.44135 36.44135