condition mean min max ZT0-3 7.818075 7.818075 7.818075 ZT4-7 5.3179 5.3179 5.3179 ZT8-11 8.460225000000001 8.460225000000001 8.460225000000001 ZT12-15 7.94147 7.94147 7.94147 ZT16-19 13.59485 13.59485 13.59485 ZT20-23 11.180530000000001 11.180530000000001 11.180530000000001