condition mean min max ZT0-3 57.065732759999996 45.350264409999994 68.78120111 ZT4-7 16.991233665000003 16.42538224 17.55708509 ZT8-11 12.440875394499999 12.025960393999998 12.855790395 ZT12-15 16.829722182500003 13.728242340000001 19.931202025000005 ZT16-19 28.1749610925 23.495878885 32.8540433 ZT20-23 48.206087405 43.852683909999996 52.5594909