condition mean min max ZT0-3 148.84466666666665 121.2875 173.85199999999998 ZT4-7 124.50550000000001 124.50550000000001 124.50550000000001 ZT8-11 132.29000000000002 132.29000000000002 132.29000000000002 ZT12-15 152.55675 146.35199999999998 158.7615 ZT16-19 155.654 155.654 155.654 ZT20-23 188.38049999999998 188.38049999999998 188.38049999999998