condition mean min max ZT0-3 74.388068 74.388068 74.388068 ZT4-7 234.689385 234.689385 234.689385 ZT8-11 249.383172 249.383172 249.383172 ZT12-15 184.19519300000002 184.19519300000002 184.19519300000002 ZT16-19 118.0860845 118.0860845 118.0860845 ZT20-23 115.63170450000001 115.63170450000001 115.63170450000001