condition mean min max ZT0-3 585.75 585.75 585.75 ZT4-7 558.2 558.2 558.2 ZT8-11 494.84999999999997 494.84999999999997 494.84999999999997 ZT12-15 497.15000000000003 497.15000000000003 497.15000000000003 ZT16-19 513.2 513.2 513.2 ZT20-23 530.15 530.15 530.15