condition mean min max ZT0-3 1176.35 1176.35 1176.35 ZT4-7 3548.7 3548.7 3548.7 ZT8-11 4008.2000000000003 4008.2000000000003 4008.2000000000003 ZT12-15 3727.05 3727.05 3727.05 ZT16-19 2059.75 2059.75 2059.75 ZT20-23 1154.0 1154.0 1154.0