condition mean min max ZT0-3 5.4804275 5.2810500000000005 5.679805 ZT4-7 3.2585949999999997 3.2585949999999997 3.2585949999999997 ZT8-11 6.546925 6.546925 6.546925 ZT12-15 0 0 0 ZT16-19 5.819369999999999 5.819369999999999 5.819369999999999 ZT20-23 4.996755 4.996755 4.996755