condition mean min max ZT0-3 105.693597 105.693597 105.693597 ZT4-7 145.59997900000002 145.59997900000002 145.59997900000002 ZT8-11 158.5386475 158.5386475 158.5386475 ZT12-15 154.337359 154.337359 154.337359 ZT16-19 171.923185 171.923185 171.923185 ZT20-23 112.3495295 112.3495295 112.3495295