condition mean min max ZT0-3 0.5902402499999999 0.5547295 0.625751 ZT4-7 0.5933865 0.5933865 0.5933865 ZT8-11 1.3130350000000002 1.3130350000000002 1.3130350000000002 ZT12-15 0 0 0 ZT16-19 1.20776 1.20776 1.20776 ZT20-23 0.8998275 0.8998275 0.8998275