condition mean min max ZT0-3 680.945625 680.945625 680.945625 ZT4-7 687.4331685 687.4331685 687.4331685 ZT8-11 530.724054 530.724054 530.724054 ZT12-15 596.851994 596.851994 596.851994 ZT16-19 754.2983194999999 754.2983194999999 754.2983194999999 ZT20-23 833.9968665 833.9968665 833.9968665