condition mean min max ZT0-3 86.463029 86.463029 86.463029 ZT4-7 62.239314500000006 62.239314500000006 62.239314500000006 ZT8-11 77.819138 77.819138 77.819138 ZT12-15 95.426444 95.426444 95.426444 ZT16-19 108.69796550000001 108.69796550000001 108.69796550000001 ZT20-23 117.5272335 117.5272335 117.5272335