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\begin{tabular}{|c|c|c|c|c|}
\cline { 2 - 4 }
\multicolumn{1}{c|}{} & A & [tex]$B$[/tex] & [tex]$C$[/tex] & Total \\
\hline
[tex]$D$[/tex] & 0.12 & 0.78 & 0.10 & 1.0 \\
\hline
[tex]$E$[/tex] & [tex]$R$[/tex] & [tex]$S$[/tex] & [tex]$T$[/tex] & 1.0 \\
\hline
Total & [tex]$U$[/tex] & [tex]$X$[/tex] & [tex]$Y$[/tex] & 1.0 \\
\hline
\end{tabular}

Which value for [tex]$R$[/tex] in the table would most likely indicate an association between the conditional variables?

A. 0.09
B. 0.10
C. 0.13
D. 0.79

Sagot :

Let's analyze the given table and the possible values for [tex]\( R \)[/tex].

Here is the provided table rewritten for clarity:

[tex]\[ \begin{array}{|c|c|c|c|c|} \cline { 2 - 4 } \multicolumn{1}{c|}{} & A & B & C & \text{Total} \\ \hline D & 0.12 & 0.78 & 0.10 & 1.0 \\ \hline E & R & S & T & 1.0 \\ \hline \text{Total} & U & X & Y & 1.0 \\ \hline \end{array} \][/tex]

First, let's find the missing column totals [tex]\( U \)[/tex], [tex]\( X \)[/tex], and [tex]\( Y \)[/tex]:

- The total for column [tex]\( A \)[/tex] (denoted as [tex]\( U \)[/tex]):
[tex]\[ U = 0.12 + R \][/tex]

- The total for column [tex]\( B \)[/tex] (denoted as [tex]\( X \)[/tex]):
[tex]\[ X = 0.78 + S \][/tex]

- The total for column [tex]\( C \)[/tex] (denoted as [tex]\( Y \)[/tex]):
[tex]\[ Y = 0.10 + T \][/tex]

Given that the overall totals of each column should sum to 1, we have:

- For column [tex]\( A \)[/tex]:
[tex]\[ 0.12 + R = 1.0 \implies R = 1.0 - 0.12 = 0.88 \][/tex]

- For column [tex]\( B \)[/tex]:
[tex]\[ 0.78 + S = 1.0 \implies S = 1.0 - 0.78 = 0.22 \][/tex]

- For column [tex]\( C \)[/tex]:
[tex]\[ 0.10 + T = 1.0 \implies T = 1.0 - 0.10 = 0.90 \][/tex]

From this analysis, let's examine the proposed values for [tex]\( R \)[/tex]:

- [tex]\( 0.09 \)[/tex]
- [tex]\( 0.10 \)[/tex]
- [tex]\( 0.13 \)[/tex]
- [tex]\( 0.79 \)[/tex]

We need to identify which value for [tex]\( R \)[/tex] would indicate an association. Note that in conditional probability and association analysis, large discrepancies between expected and observed frequencies can indicate such associations.

Given that [tex]\( D \)[/tex] represents 78% in column [tex]\( B \)[/tex], we need a value for [tex]\( R \)[/tex] which can practically differentiate column [tex]\( A \)[/tex]. Here, a value like [tex]\( 0.79 \)[/tex] for [tex]\( R \)[/tex] would show that most values of [tex]\( E \)[/tex] are conversing significantly to column [tex]\( A \)[/tex]. It highlights a much higher discrepancy compared to the other proposed values (0.09, 0.10, and 0.13).

The value [tex]\( 0.79 \)[/tex] is much larger, indicating a much stronger association between the variables compared to other provided values which are significantly smaller.

Therefore, the value for [tex]\( R \)[/tex] that most likely indicates an association between the conditional variables is:
[tex]\[ \boxed{0.79} \][/tex]
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