condition mean min max ZT0-3 7.7341575 7.725975 7.74234 ZT4-7 10.880600000000001 10.880600000000001 10.880600000000001 ZT8-11 10.294605 10.294605 10.294605 ZT12-15 0 0 0 ZT16-19 10.81987 10.81987 10.81987 ZT20-23 9.638660000000002 9.638660000000002 9.638660000000002