condition mean min max ZT0-3 1.49704375 1.1643375 1.82975 ZT4-7 2.0084049999999998 2.0084049999999998 2.0084049999999998 ZT8-11 1.9131 1.9131 1.9131 ZT12-15 0 0 0 ZT16-19 4.03083 4.03083 4.03083 ZT20-23 3.139105 3.139105 3.139105