condition mean min max ZT0-3 7.982559999999999 7.982559999999999 7.982559999999999 ZT4-7 6.033099999999999 6.033099999999999 6.033099999999999 ZT8-11 5.3693100000000005 5.3693100000000005 5.3693100000000005 ZT12-15 6.44494 6.44494 6.44494 ZT16-19 6.38889 6.38889 6.38889 ZT20-23 8.655465 8.655465 8.655465