按盒计算的抽样方差,得 n2 0 NaC5 Z ( . = 6 ) = 1 2 = 200 , x [ ( s ) + ( - 3 ) + ( 3 ) + ( - ) + ( - ) +3 (高) ] - 192 224 X 11200 2304 : 0.001667 .
確定! 回上一頁