condition mean min max ZT0-3 1.3311623885000001 0.5493538179999999 2.112970959 ZT4-7 1.45461213475 0.4267378755 2.482486394 ZT8-11 19.368293332 11.668086814 27.068499850000002 ZT12-15 49.923271325 45.352801455 54.493741195 ZT16-19 37.9134558775 37.896984415 37.92992734 ZT20-23 36.312401265 36.050480269999994 36.57432226