To find the joint relative frequency of elementary age students who prefer winter, we first need to calculate the frequency of elementary age students who prefer winter and then divide it by the total number of students surveyed.
From the table, the frequency of elementary age students who prefer winter is 84. The total number of students surveyed is 251.
Now, we calculate the joint relative frequency:
\[ \text{Joint Relative Frequency} = \frac{\text{Frequency of Elementary Age Students who prefer Winter}}{\text{Total Number of Students}} = \frac{84}{251} \]
Now, we can calculate this value:
\[ \frac{84}{251} \approx 0.334 \]
To express this as a percentage, we multiply by 100:
\[ 0.334 \times 100 \approx 33.4% \]
Rounding to the nearest whole number gives us 33%. However, since you've mentioned that the answer is not 33, let's check the calculation again.
We'll use:
\[ \text{Joint Relative Frequency} = \frac{84}{251} \times 100 \approx 33.47 \]
Round 33.47 to the nearest whole number gives 33%. If you're referring to a different calculation or need clarification on a different context, could you please provide more details? Otherwise, based on the provided data and standard calculations, the joint relative frequency is indeed 33%.