condition mean min max ZT0-3 45.38863689833333 42.60059323666667 48.17668056 ZT4-7 41.45652843 40.71312238 42.199934479999996 ZT8-11 54.172070355 53.13795693 55.206183779999996 ZT12-15 56.115458739999994 49.593445966666664 62.63747151333333 ZT16-19 79.78269087833334 77.69235748999999 81.87302426666668 ZT20-23 78.359003535 70.73952848 85.97847859