condition mean min max ZT0-3 75.319296 75.319296 75.319296 ZT4-7 69.9810865 69.9810865 69.9810865 ZT8-11 261.7748115 261.7748115 261.7748115 ZT12-15 109.0901695 109.0901695 109.0901695 ZT16-19 886.229154 886.229154 886.229154 ZT20-23 1398.6224275 1398.6224275 1398.6224275