condition mean min max ZT0-3 25.85280239916667 25.764610083333334 25.940994715000002 ZT4-7 24.17023879 24.04698771 24.29348987 ZT8-11 28.732463655000004 27.38548005 30.079447260000002 ZT12-15 23.463899286666667 21.15158285 25.776215723333333 ZT16-19 28.84507825 28.743949233333332 28.94620726666667 ZT20-23 24.532144385000002 23.81082773 25.25346104