CAPE Applied Mathematics Unit 1 · 2017 · Paper 1 · Question Q32
Items 31--32 refer to the following contingency table which shows the observed results used to investigate whether the variables X and Y are independent.
\begin{tabular}{|c|c|c|c|}
\hline
& X_1 & X_2 & X_3 \\
\hline
Y_1 & 43 & 26 & 54 \\
Y_2 & 15 & 10 & 17 \\
Y_3 & 18 & 22 & 20 \\
\hline
\end{tabular}
The expected value of the cell which contains the number, 15, (Y_2, X_1), to the NEAREST whole number is
- (A)5
- (B)14
- (C)25
- (D)42
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