condition mean min max ZT0-3 104.00686666666667 68.10910000000001 127.9785 ZT4-7 51.4578 51.4578 51.4578 ZT8-11 38.102199999999996 38.102199999999996 38.102199999999996 ZT12-15 36.158 33.26435 39.05165 ZT16-19 50.12935 50.12935 50.12935 ZT20-23 97.30385 97.30385 97.30385