condition mean min max ZT0-3 79.91555 79.91555 79.91555 ZT4-7 66.082 66.082 66.082 ZT8-11 64.24719999999999 64.24719999999999 64.24719999999999 ZT12-15 64.6235 64.6235 64.6235 ZT16-19 79.50565 79.50565 79.50565 ZT20-23 79.7187 79.7187 79.7187