condition mean min max ZT0-3 1.5639775 1.460925 1.66703 ZT4-7 1.0130145 1.0130145 1.0130145 ZT8-11 1.2522929999999999 1.2522929999999999 1.2522929999999999 ZT12-15 0 0 0 ZT16-19 0.9963105000000001 0.9963105000000001 0.9963105000000001 ZT20-23 1.4394900000000002 1.4394900000000002 1.4394900000000002