condition mean min max ZT0-3 4.85644989875 4.184331469 5.5285683285000005 ZT4-7 4.54370704975 4.444398932 4.6430151675 ZT8-11 4.7410387975 2.5955782055 6.8864993895 ZT12-15 12.3003469525 10.13454482 14.466149085 ZT16-19 11.3361203945 10.243795484 12.428445305 ZT20-23 14.453309212499999 13.706825649999999 15.199792774999999