condition mean min max ZT0-3 16.57385 14.0566 19.091099999999997 ZT4-7 10.27935 10.27935 10.27935 ZT8-11 8.033075 8.033075 8.033075 ZT12-15 0 0 0 ZT16-19 12.687249999999999 12.687249999999999 12.687249999999999 ZT20-23 14.5153 14.5153 14.5153