condition mean min max ZT0-3 3.2634575 3.245075 3.28184 ZT4-7 4.813445 4.813445 4.813445 ZT8-11 2.78646 2.78646 2.78646 ZT12-15 0 0 0 ZT16-19 0.991232 0.991232 0.991232 ZT20-23 2.24477 2.24477 2.24477