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For questions in Mathematics Education as a scientific discipline. For more hands-on questions on teaching Mathematics, please use the tag teaching. There is also a Stack Exchange community http://matheducators.stackexchange.com/

34 votes

Examples of common false beliefs in mathematics

Suppose that two features $[x,y]$ from a population $P$ are positively correlated. We divide $P$ into two subclasses $P_1$, $P_2$. Then, it cannot happen that the respective features ( $[x_1,y_1]$ an …