condition mean min max ZT0-3 170.4 170.4 170.4 ZT4-7 127.8 127.8 127.8 ZT8-11 115.1 115.1 115.1 ZT12-15 274.3 274.3 274.3 ZT16-19 393.35 393.35 393.35 ZT20-23 256.9 256.9 256.9