condition mean min max ZT0-3 14.5323 14.5323 14.5323 ZT4-7 14.917449999999999 14.917449999999999 14.917449999999999 ZT8-11 13.04465 13.04465 13.04465 ZT12-15 12.7675 12.7675 12.7675 ZT16-19 17.99625 17.99625 17.99625 ZT20-23 15.13445 15.13445 15.13445