condition mean min max ZT0-3 467.54999999999995 467.54999999999995 467.54999999999995 ZT4-7 353.1 353.1 353.1 ZT8-11 342.5 342.5 342.5 ZT12-15 291.29999999999995 291.29999999999995 291.29999999999995 ZT16-19 257.4 257.4 257.4 ZT20-23 327.65 327.65 327.65