condition mean min max ZT0-3 0.9302215 0.9302215 0.9302215 ZT4-7 0.938367 0.938367 0.938367 ZT8-11 0.7764215 0.7764215 0.7764215 ZT12-15 1.002197 1.002197 1.002197 ZT16-19 1.408235 1.408235 1.408235 ZT20-23 1.1205165 1.1205165 1.1205165