condition mean min max ZT0-3 588.083011 588.083011 588.083011 ZT4-7 723.9684884999999 723.9684884999999 723.9684884999999 ZT8-11 746.771938 746.771938 746.771938 ZT12-15 701.797849 701.797849 701.797849 ZT16-19 968.9044915000001 968.9044915000001 968.9044915000001 ZT20-23 905.6794414999999 905.6794414999999 905.6794414999999