condition mean min max ZT0-3 403.855936 403.855936 403.855936 ZT4-7 328.771794 328.771794 328.771794 ZT8-11 326.12839199999996 326.12839199999996 326.12839199999996 ZT12-15 386.21894050000003 386.21894050000003 386.21894050000003 ZT16-19 459.945851 459.945851 459.945851 ZT20-23 432.242595 432.242595 432.242595