condition mean min max ZT0-3 21.908275000000003 20.160600000000002 23.65595 ZT4-7 21.574550000000002 21.574550000000002 21.574550000000002 ZT8-11 18.117350000000002 18.117350000000002 18.117350000000002 ZT12-15 0 0 0 ZT16-19 28.717 28.717 28.717 ZT20-23 27.118450000000003 27.118450000000003 27.118450000000003