condition mean min max ZT0-3 35.7795 34.976 36.583 ZT4-7 28.23925 28.23925 28.23925 ZT8-11 60.2449 60.2449 60.2449 ZT12-15 0 0 0 ZT16-19 94.747 94.747 94.747 ZT20-23 57.42645 57.42645 57.42645