condition mean min max ZT0-3 32.7278 32.7278 32.7278 ZT4-7 20.07625 20.07625 20.07625 ZT8-11 19.87395 19.87395 19.87395 ZT12-15 23.3681 23.3681 23.3681 ZT16-19 43.6282 43.6282 43.6282 ZT20-23 38.1644 38.1644 38.1644