condition mean min max ZT0-3 1.9883 1.86834 2.10826 ZT4-7 2.39378 2.39378 2.39378 ZT8-11 3.9123149999999995 3.9123149999999995 3.9123149999999995 ZT12-15 0 0 0 ZT16-19 1.58623 1.58623 1.58623 ZT20-23 2.234755 2.234755 2.234755