condition mean min max ZT0-3 0.027495475 0.027477 0.02751395 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0270222 0.0270222 0.0270222 ZT20-23 0.0541955 0.0541955 0.0541955