condition mean min max ZT0-3 388.6075 388.6075 388.6075 ZT4-7 337.4705 337.4705 337.4705 ZT8-11 420.135 420.135 420.135 ZT12-15 303.66999999999996 303.66999999999996 303.66999999999996 ZT16-19 465.0335 465.0335 465.0335 ZT20-23 356.42150000000004 356.42150000000004 356.42150000000004