condition mean min max ZT0-3 291.301994 291.301994 291.301994 ZT4-7 337.57142050000004 337.57142050000004 337.57142050000004 ZT8-11 243.8525745 243.8525745 243.8525745 ZT12-15 216.6417785 216.6417785 216.6417785 ZT16-19 226.1942415 226.1942415 226.1942415 ZT20-23 331.2184555 331.2184555 331.2184555