condition mean min max ZT0-3 28.318399999999997 25.7655 30.871299999999998 ZT4-7 38.875550000000004 38.875550000000004 38.875550000000004 ZT8-11 40.894800000000004 40.894800000000004 40.894800000000004 ZT12-15 0 0 0 ZT16-19 35.6033 35.6033 35.6033 ZT20-23 34.066500000000005 34.066500000000005 34.066500000000005