condition mean min max ZT0-3 6.675802753999999 6.308209203 7.043396305 ZT4-7 4.5931622835 4.133979168 5.052345399 ZT8-11 6.109299165 5.288866155500001 6.9297321745 ZT12-15 6.60720650325 5.9472469844999996 7.267166022 ZT16-19 2.7529867235 2.5169975669999998 2.98897588 ZT20-23 3.68170966775 3.621214407 3.7422049285