condition mean min max ZT0-3 11600.0 11600.0 11600.0 ZT4-7 20740.5 20740.5 20740.5 ZT8-11 20587.25 20587.25 20587.25 ZT12-15 18271.300000000003 18271.300000000003 18271.300000000003 ZT16-19 16977.7 16977.7 16977.7 ZT20-23 14326.900000000001 14326.900000000001 14326.900000000001