condition mean min max ZT0-3 5.8157075 5.60172 6.029695 ZT4-7 4.190049999999999 4.190049999999999 4.190049999999999 ZT8-11 7.159414999999999 7.159414999999999 7.159414999999999 ZT12-15 0 0 0 ZT16-19 12.10615 12.10615 12.10615 ZT20-23 9.57471 9.57471 9.57471