condition mean min max ZT0-3 3.3033975 3.00442 3.602375 ZT4-7 2.621015 2.621015 2.621015 ZT8-11 2.150895 2.150895 2.150895 ZT12-15 0 0 0 ZT16-19 4.617255 4.617255 4.617255 ZT20-23 5.06116 5.06116 5.06116