condition mean min max ZT0-3 56.522487055 54.84890528 58.19606883 ZT4-7 58.39196671166667 54.24245739333333 62.54147603 ZT8-11 56.40077352 52.40595606 60.39559098 ZT12-15 57.372886565 54.74086364 60.00490949 ZT16-19 50.03084734666667 48.99981798333334 51.06187671 ZT20-23 49.94760696833333 47.23439603 52.660817906666665