condition mean min max ZT0-3 9.454485 7.717535 12.45985 ZT4-7 11.023060000000001 11.023060000000001 11.023060000000001 ZT8-11 10.8369 10.8369 10.8369 ZT12-15 24.11475 23.7393 24.4902 ZT16-19 16.66115 16.66115 16.66115 ZT20-23 13.309650000000001 13.309650000000001 13.309650000000001