condition mean min max ZT0-3 298.51 298.51 298.51 ZT4-7 277.62055553333335 277.62055553333335 277.62055553333335 ZT8-11 478.98111109999996 478.98111109999996 478.98111109999996 ZT12-15 614.3111111333334 614.3111111333334 614.3111111333334 ZT16-19 578.9511111 578.9511111 578.9511111 ZT20-23 444.6177778 444.6177778 444.6177778