condition mean min max ZT0-3 51.4213976875 48.202632685 54.64016269 ZT4-7 59.98800787166667 56.72943462666667 63.24658111666667 ZT8-11 63.80397756 60.896406713333334 66.71154840666667 ZT12-15 68.916346355 65.99445652 71.83823619 ZT16-19 61.178121483333335 60.23252423666667 62.12371873 ZT20-23 52.313920295 49.0892356 55.53860499