condition mean min max ZT0-3 1.3176074999999998 1.2158799999999998 1.419335 ZT4-7 1.884485 1.884485 1.884485 ZT8-11 1.457855 1.457855 1.457855 ZT12-15 0 0 0 ZT16-19 2.2209649999999996 2.2209649999999996 2.2209649999999996 ZT20-23 2.2029449999999997 2.2029449999999997 2.2029449999999997