condition mean min max ZT0-3 59.5377156175 56.254338625 62.82109261 ZT4-7 62.942277680000004 59.20359235 66.68096301 ZT8-11 67.20582534166667 65.23250064333334 69.17915004 ZT12-15 37.516683935 30.25895663 44.77441124 ZT16-19 33.08418814166667 31.673116020000002 34.495260263333336 ZT20-23 35.61182082166667 29.27580471 41.947836933333335