condition mean min max ZT0-3 5.280365 5.280365 5.280365 ZT4-7 5.207504999999999 5.207504999999999 5.207504999999999 ZT8-11 3.56553 3.56553 3.56553 ZT12-15 3.60998 3.60998 3.60998 ZT16-19 3.797 3.797 3.797 ZT20-23 4.852245 4.852245 4.852245