condition mean min max ZT0-3 3.3618875 3.35567 3.368105 ZT4-7 3.1140800000000004 3.1140800000000004 3.1140800000000004 ZT8-11 2.62652 2.62652 2.62652 ZT12-15 0 0 0 ZT16-19 3.4776 3.4776 3.4776 ZT20-23 3.50128 3.50128 3.50128