An Official of a Large National Union Claims That the Fraction

Essay

An official of a large national union claims that the fraction of women in the union is not significantly different from one-half. Using the sample information reported below, carry out a test of this statement. Use a .05 level of significance. $$\begin{array} { l l } \text { sample size } & 400 \\\text { women } & 168 \\\text { men } & 232\end{array}$$