condition mean min max ZT0-3 10.169852500000001 10.07577 10.263935 ZT4-7 14.99905 14.99905 14.99905 ZT8-11 11.503 11.503 11.503 ZT12-15 0 0 0 ZT16-19 11.08565 11.08565 11.08565 ZT20-23 12.09605 12.09605 12.09605