condition mean min max ZT0-3 42.935678769999996 39.5227181 46.34863944 ZT4-7 21.771189695 21.282900345 22.259479045 ZT8-11 27.4747580225 21.166581905 33.78293414 ZT12-15 44.65932428 43.98728647 45.33136209 ZT16-19 53.8919883075 49.714631229999995 58.069345385 ZT20-23 43.0842555525 41.00544543 45.163065675