condition mean min max ZT0-3 64.766985 64.766985 64.766985 ZT4-7 79.847096 79.847096 79.847096 ZT8-11 82.096767 82.096767 82.096767 ZT12-15 66.612178 66.612178 66.612178 ZT16-19 99.59987100000001 99.59987100000001 99.59987100000001 ZT20-23 94.0747345 94.0747345 94.0747345