condition mean min max ZT0-3 38.144999999999996 36.2853 39.48795 ZT4-7 31.5869 31.5869 31.5869 ZT8-11 32.0181 32.0181 32.0181 ZT12-15 59.554625 54.09085 65.0184 ZT16-19 45.53425 45.53425 45.53425 ZT20-23 48.726600000000005 48.726600000000005 48.726600000000005