condition mean min max ZT0-3 4940.616672 4940.616672 4940.616672 ZT4-7 3909.4400535 3909.4400535 3909.4400535 ZT8-11 3884.696668 3884.696668 3884.696668 ZT12-15 4001.777983 4001.777983 4001.777983 ZT16-19 4195.7432485 4195.7432485 4195.7432485 ZT20-23 4459.675945999999 4459.675945999999 4459.675945999999