condition mean min max ZT0-3 9.9329775 9.86157 10.004385 ZT4-7 8.27092 8.27092 8.27092 ZT8-11 10.856465 10.856465 10.856465 ZT12-15 0 0 0 ZT16-19 12.47095 12.47095 12.47095 ZT20-23 10.31759 10.31759 10.31759