condition mean min max ZT0-3 300.695031 300.695031 300.695031 ZT4-7 357.531808 357.531808 357.531808 ZT8-11 395.117549 395.117549 395.117549 ZT12-15 412.59108100000003 412.59108100000003 412.59108100000003 ZT16-19 432.3139575 432.3139575 432.3139575 ZT20-23 291.407332 291.407332 291.407332