condition mean min max ZT0-3 64.948298 64.948298 64.948298 ZT4-7 56.752817500000006 56.752817500000006 56.752817500000006 ZT8-11 57.988009500000004 57.988009500000004 57.988009500000004 ZT12-15 74.25446550000001 74.25446550000001 74.25446550000001 ZT16-19 73.344056 73.344056 73.344056 ZT20-23 84.9546185 84.9546185 84.9546185