condition mean min max ZT0-3 4103.950000000001 4103.950000000001 4103.950000000001 ZT4-7 2405.5 2405.5 2405.5 ZT8-11 2696.1 2696.1 2696.1 ZT12-15 2498.05 2498.05 2498.05 ZT16-19 3197.7 3197.7 3197.7 ZT20-23 4084.05 4084.05 4084.05