condition mean min max ZT0-3 0.525285 0.277768 0.8774215000000001 ZT4-7 0.4354815 0.4354815 0.4354815 ZT8-11 0.6757405000000001 0.6757405000000001 0.6757405000000001 ZT12-15 0.9536490000000001 0.7901575000000001 1.1171405 ZT16-19 1.75054 1.75054 1.75054 ZT20-23 1.3770135000000001 1.3770135000000001 1.3770135000000001