condition mean min max ZT0-3 511.1 511.1 511.1 ZT4-7 546.1 546.1 546.1 ZT8-11 472.75 472.75 472.75 ZT12-15 328.7 328.7 328.7 ZT16-19 305.8 305.8 305.8 ZT20-23 422.7 422.7 422.7