The data in the table describes the preferred type of exercise as surveyed by 9th graders.

\begin{tabular}{|c|l|l|l|l|}
\hline & Cycling & Running & Swimming & Total \\
\hline Males & [tex]$15 \%$[/tex] & [tex]$13 \%$[/tex] & [tex]$21 \%$[/tex] & [tex]$49 \%$[/tex] \\
\hline Females & [tex]$12 \%$[/tex] & [tex]$16 \%$[/tex] & [tex]$23 \%$[/tex] & [tex]$51 \%$[/tex] \\
\hline Total & [tex]$27 \%$[/tex] & [tex]$29 \%$[/tex] & [tex]$44 \%$[/tex] & [tex]$100 \%$[/tex] \\
\hline
\end{tabular}

Compare the conditional relative frequencies of a male preferring running to a female preferring running. Round your answers to two decimal places.

A. 0.49 to 0.51
B. 0.44 to 0.55
C. 0.37 to 0.48
D. 0.27 to 0.31



Answer :

First, let's define the problem clearly. We need to compare the likelihood of a male preferring running to the likelihood of a female preferring running, given the total percentages of males and females, respectively, who prefer running and their total populations.

### Step-by-Step Solution

1. Identify the given percentages:
- Males:
- Cycling: 15%
- Running: 13%
- Swimming: 21%
- Total: 49%
- Females:
- Cycling: 12%
- Running: 16%
- Swimming: 23%
- Total: 51%

2. Calculate the conditional relative frequency for males preferring running:
- Here, we use the percentage of males who prefer running compared to the total number of males.
- The percentage of males who prefer running is 13%.
- The total percentage of males is 49%.
- Conditional relative frequency for males preferring running:
[tex]\[ \text{Male Conditional Running} = \frac{13\%}{49\%} \][/tex]
- Converting percentages to decimals for easier calculation:
[tex]\[ \text{Male Conditional Running} = \frac{0.13}{0.49} \approx 0.27 \, (\text{rounded to 2 decimal places}) \][/tex]

3. Calculate the conditional relative frequency for females preferring running:
- Similarly, we use the percentage of females who prefer running compared to the total number of females.
- The percentage of females who prefer running is 16%.
- The total percentage of females is 51%.
- Conditional relative frequency for females preferring running:
[tex]\[ \text{Female Conditional Running} = \frac{16\%}{51\%} \][/tex]
- Converting percentages to decimals for easier calculation:
[tex]\[ \text{Female Conditional Running} = \frac{0.16}{0.51} \approx 0.31 \, (\text{rounded to 2 decimal places}) \][/tex]

4. Compare the conditional relative frequencies:
- For males preferring running: [tex]\( \approx 0.27 \)[/tex]
- For females preferring running: [tex]\( \approx 0.31 \)[/tex]

Therefore, comparing both values, we get that the conditional relative frequencies of a male preferring running to a female preferring running are approximately [tex]\(0.27\)[/tex] to [tex]\(0.31\)[/tex].