condition mean min max ZT0-3 0.5441035 0.5441035 0.5441035 ZT4-7 0.6318655 0.6318655 0.6318655 ZT8-11 1.990275 1.990275 1.990275 ZT12-15 1.0716320000000001 1.0716320000000001 1.0716320000000001 ZT16-19 1.6427 1.6427 1.6427 ZT20-23 0.570822 0.570822 0.570822