condition mean min max ZT0-3 2.88707 2.56004 3.2141 ZT4-7 9.907895 9.907895 9.907895 ZT8-11 4.5791699999999995 4.5791699999999995 4.5791699999999995 ZT12-15 0 0 0 ZT16-19 2.8536 2.8536 2.8536 ZT20-23 5.376205000000001 5.376205000000001 5.376205000000001