condition mean min max ZT0-3 18.9247456895 9.078544424 28.770946955 ZT4-7 29.0012883275 27.836213435 30.16636322 ZT8-11 30.142213237500002 24.258542175000002 36.0258843 ZT12-15 35.419393927499996 34.649599595 36.189188259999995 ZT16-19 30.742864745 27.844141595 33.641587895 ZT20-23 36.940945045 36.782125095 37.099764995