随机猜测哪个列的值？例如随机猜测每一行的性别是probability of it is male but guess female + vice versa：$\frac{7}{10}\times\frac{1}{2} + \frac{3}{10}\times \frac{1}{2} = \frac{1}{2}$这意味着随机猜测的值的错误Gender是$50\%$. 您也可以通过每列的可能值来计算其他人。例如对于Hair Length错误将是$\frac{2}{3}$或者$66.66\%$.