condition mean min max ZT0-3 69.21628333333334 63.7094 75.387 ZT4-7 42.46225 42.46225 42.46225 ZT8-11 32.0363 32.0363 32.0363 ZT12-15 53.624775 51.852450000000005 55.3971 ZT16-19 44.31165 44.31165 44.31165 ZT20-23 54.098349999999996 54.098349999999996 54.098349999999996