condition mean min max ZT0-3 445.001288 445.001288 445.001288 ZT4-7 465.8940355 465.8940355 465.8940355 ZT8-11 349.648862 349.648862 349.648862 ZT12-15 375.781298 375.781298 375.781298 ZT16-19 388.4784645 388.4784645 388.4784645 ZT20-23 381.0411385 381.0411385 381.0411385