condition mean min max ZT0-3 43.22613333333334 37.193799999999996 48.74895 ZT4-7 37.43455 37.43455 37.43455 ZT8-11 31.1998 31.1998 31.1998 ZT12-15 26.510749999999998 19.7442 33.2773 ZT16-19 30.3044 30.3044 30.3044 ZT20-23 38.9713 38.9713 38.9713