condition mean min max ZT0-3 0.1910751 0.12071620000000001 0.261434 ZT4-7 0.1391295 0.1391295 0.1391295 ZT8-11 0.16936400000000001 0.16936400000000001 0.16936400000000001 ZT12-15 0 0 0 ZT16-19 0.3024395 0.3024395 0.3024395 ZT20-23 0.24392999999999998 0.24392999999999998 0.24392999999999998