condition mean min max ZT0-3 1.03753625 0.9978625000000001 1.07721 ZT4-7 0.5680645 0.5680645 0.5680645 ZT8-11 0.5746005000000001 0.5746005000000001 0.5746005000000001 ZT12-15 0 0 0 ZT16-19 0.6857059999999999 0.6857059999999999 0.6857059999999999 ZT20-23 0.9384705 0.9384705 0.9384705