condition mean min max ZT0-3 22.6832 16.854300000000002 32.2913 ZT4-7 30.2546 30.2546 30.2546 ZT8-11 28.752299999999998 28.752299999999998 28.752299999999998 ZT12-15 31.93755 30.742350000000002 33.13275 ZT16-19 28.0077 28.0077 28.0077 ZT20-23 24.463549999999998 24.463549999999998 24.463549999999998