condition mean min max ZT0-3 0.340918037 0.271937845 0.409898229 ZT4-7 0.36764329725 0.168453047 0.5668335475 ZT8-11 0.7389239357499999 0.5939437835 0.883904088 ZT12-15 0.49963548849999995 0.34299464449999995 0.6562763325 ZT16-19 0.47556371225 0.453837453 0.4972899715 ZT20-23 0.421201736 0.387784903 0.454618569