condition mean min max ZT0-3 22.9384 22.9384 22.9384 ZT4-7 20.65025 20.65025 20.65025 ZT8-11 21.9559 21.9559 21.9559 ZT12-15 19.9221 19.9221 19.9221 ZT16-19 26.43455 26.43455 26.43455 ZT20-23 20.5522 20.5522 20.5522