condition mean min max ZT0-3 0.59654375 0.5016130000000001 0.6914745 ZT4-7 0.5636535 0.5636535 0.5636535 ZT8-11 1.1242295 1.1242295 1.1242295 ZT12-15 0 0 0 ZT16-19 1.225203 1.225203 1.225203 ZT20-23 0.9077704999999999 0.9077704999999999 0.9077704999999999