condition mean min max ZT0-3 9.038205 9.038205 9.038205 ZT4-7 9.381715 9.381715 9.381715 ZT8-11 11.22411 11.22411 11.22411 ZT12-15 8.481126 8.481126 8.481126 ZT16-19 8.8194215 8.8194215 8.8194215 ZT20-23 9.282114499999999 9.282114499999999 9.282114499999999