condition mean min max ZT0-3 4.18904741325 3.378760165 4.999334661500001 ZT4-7 4.253020160249999 4.069933004 4.436107316499999 ZT8-11 5.3649188905 4.738807812 5.9910299689999995 ZT12-15 7.9958069190000005 6.385271541 9.606342297000001 ZT16-19 9.7240751545 8.757570179 10.69058013 ZT20-23 10.31317597175 9.920036558500001 10.706315385