condition mean min max ZT0-3 1.8081 1.8081 1.8081 ZT4-7 1.22459 1.22459 1.22459 ZT8-11 1.57336 1.57336 1.57336 ZT12-15 1.98337 1.98337 1.98337 ZT16-19 2.2594700000000003 2.2594700000000003 2.2594700000000003 ZT20-23 1.66192 1.66192 1.66192