condition mean min max ZT0-3 57.164586649166665 55.60657842333334 58.722594875 ZT4-7 50.394097435000006 44.57018081333334 56.21801405666667 ZT8-11 54.79424605166666 50.15841937333333 59.43007273 ZT12-15 65.95362550499999 64.79798901 67.109262 ZT16-19 79.95735745 71.51742427666667 88.39729062333333 ZT20-23 75.92248044499999 70.67795359 81.1670073