condition mean min max ZT0-3 299.6 299.6 299.6 ZT4-7 280.7 280.7 280.7 ZT8-11 212.9 212.9 212.9 ZT12-15 262.85 262.85 262.85 ZT16-19 216.9 216.9 216.9 ZT20-23 253.9 253.9 253.9