condition mean min max ZT0-3 22.2255 22.2255 22.2255 ZT4-7 17.65935 17.65935 17.65935 ZT8-11 18.14565 18.14565 18.14565 ZT12-15 38.11405 38.11405 38.11405 ZT16-19 38.23165 38.23165 38.23165 ZT20-23 28.3542 28.3542 28.3542