condition mean min max ZT0-3 606.85 606.85 606.85 ZT4-7 767.6 767.6 767.6 ZT8-11 577.25 577.25 577.25 ZT12-15 923.65 923.65 923.65 ZT16-19 995.0999999999999 995.0999999999999 995.0999999999999 ZT20-23 708.3499999999999 708.3499999999999 708.3499999999999