condition mean min max ZT0-3 15.47954 9.295670000000001 18.757399999999997 ZT4-7 12.671199999999999 12.671199999999999 12.671199999999999 ZT8-11 34.6821 34.6821 34.6821 ZT12-15 20.15025 15.422799999999999 24.877699999999997 ZT16-19 18.276 18.276 18.276 ZT20-23 23.214350000000003 23.214350000000003 23.214350000000003