condition mean min max ZT0-3 16.439709835000002 11.823197140000001 21.05622253 ZT4-7 31.98786954 29.97105068 34.0046884 ZT8-11 38.23120120833333 37.45758879 39.00481362666667 ZT12-15 36.44260459666667 36.40118833 36.484020863333335 ZT16-19 39.09437384333334 38.460166470000004 39.72858121666667 ZT20-23 34.75681457 33.297625743333334 36.21600339666667