condition mean min max ZT0-3 4.79725 4.79725 4.79725 ZT4-7 2.11468 2.11468 2.11468 ZT8-11 1.338647 1.338647 1.338647 ZT12-15 4.0792150000000005 4.0792150000000005 4.0792150000000005 ZT16-19 3.058195 3.058195 3.058195 ZT20-23 9.67765 9.67765 9.67765