condition mean min max ZT0-3 1327.348469 1327.348469 1327.348469 ZT4-7 1130.488458 1130.488458 1130.488458 ZT8-11 1636.7201355 1636.7201355 1636.7201355 ZT12-15 1839.2295525 1839.2295525 1839.2295525 ZT16-19 2416.3710555000002 2416.3710555000002 2416.3710555000002 ZT20-23 2019.038581 2019.038581 2019.038581