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A sample of 325 people is surveyed. The people are classified according to political affiliation ("Democrat", "Republican", or "Independent"). They are also classified according to opinion on a bill ("in favor of", "opposed to", or "indifferent to"). The results are given in the contingency table below.

\begin{tabular}{|c|c|c|c|}
\hline
& In favor of & Opposed to & Indifferent to \\
\hline
Democrat & 35 & 45 & 23 \\
\hline
Republican & 32 & 19 & 39 \\
\hline
Independent & 41 & 43 & 48 \\
\hline
\end{tabular}

What is the relative frequency of respondents who are in favor of the bill? Round your answer to two decimal places.

[tex]$\square$[/tex]


Sagot :

To find the relative frequency of respondents who are in favor of the bill, we will follow these steps:

1. Identify the number of respondents in favor of the bill:
- Democrat respondents in favor: [tex]\(35\)[/tex]
- Republican respondents in favor: [tex]\(32\)[/tex]
- Independent respondents in favor: [tex]\(41\)[/tex]

Therefore, the total number of respondents in favor of the bill is:
[tex]\[ 35 + 32 + 41 = 108 \][/tex]

2. Determine the total number of survey respondents:
The total number of respondents surveyed is [tex]\(325\)[/tex].

3. Calculate the relative frequency:
The relative frequency is the ratio of the number of respondents in favor of the bill to the total number of respondents. This can be calculated as:
[tex]\[ \text{Relative frequency} = \frac{\text{Number of respondents in favor}}{\text{Total number of respondents}} = \frac{108}{325} \approx 0.3323076923076923 \][/tex]

4. Round the relative frequency to two decimal places:
The relative frequency rounded to two decimal places is:
[tex]\[ \text{Relative frequency (rounded)} \approx 0.33 \][/tex]

So, the relative frequency of respondents who are in favor of the bill, rounded to two decimal places, is:
[tex]\[ \boxed{0.33} \][/tex]
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