condition mean min max ZT0-3 293.5 293.5 293.5 ZT4-7 549.7 549.7 549.7 ZT8-11 478.54999999999995 478.54999999999995 478.54999999999995 ZT12-15 333.04999999999995 333.04999999999995 333.04999999999995 ZT16-19 353.15 353.15 353.15 ZT20-23 322.25 322.25 322.25