condition mean min max ZT0-3 7.139715000000001 7.139715000000001 7.139715000000001 ZT4-7 4.20698 4.20698 4.20698 ZT8-11 3.797715 3.797715 3.797715 ZT12-15 3.71795 3.71795 3.71795 ZT16-19 11.49785 11.49785 11.49785 ZT20-23 7.450654999999999 7.450654999999999 7.450654999999999