condition mean min max ZT0-3 4.8073260225 4.59348877 5.021163275 ZT4-7 5.562668244999999 4.570526769 6.554809721 ZT8-11 7.377281131249999 5.794411681 8.960150581499999 ZT12-15 10.722316072999998 9.63599457 11.808637575999999 ZT16-19 8.82677933375 8.410942458 9.2426162095 ZT20-23 10.79053707575 9.8356116315 11.74546252