摘要
本文运用概率统计的理论导出难度系数的计算公式 :D (x) =0 .1Φ- 1(x* ) + 0 .5,进而给出以此公式的计分公式 T =aΦ- 1(x* ) + b。
By using theory of Probability and Statistic, this paper conclud a formula to calculate coefficient of difficulty: D(x)=0 1Φ -1 (x *)+0.5 , and as following present a formula of mark: T=aΦ -1 (x *)+b . The formula can be used at many stages of synthetic appraise.
出处
《工科数学》
2001年第1期16-19,共4页
Journal of Mathematics For Technology
