condition mean min max ZT0-3 16.1291 16.1291 16.1291 ZT4-7 13.974699999999999 13.974699999999999 13.974699999999999 ZT8-11 9.968544999999999 9.968544999999999 9.968544999999999 ZT12-15 11.8519 11.8519 11.8519 ZT16-19 13.98775 13.98775 13.98775 ZT20-23 15.24655 15.24655 15.24655