condition mean min max ZT0-3 331.6 331.6 331.6 ZT4-7 280.5 280.5 280.5 ZT8-11 300.35 300.35 300.35 ZT12-15 287.1 287.1 287.1 ZT16-19 384.6 384.6 384.6 ZT20-23 332.35 332.35 332.35