condition mean min max ZT0-3 655.30898 655.30898 655.30898 ZT4-7 239.04465549999998 239.04465549999998 239.04465549999998 ZT8-11 309.96099000000004 309.96099000000004 309.96099000000004 ZT12-15 454.70688200000006 454.70688200000006 454.70688200000006 ZT16-19 716.7647505 716.7647505 716.7647505 ZT20-23 698.2256715000001 698.2256715000001 698.2256715000001