To calculate the percentage of students who own a bird as a pet based on the two samples, we first need to find the total number of students who own a bird across both samples.
From the data provided:
- Sample 1: 8 students own a bird.
- Sample 2: 12 students own a bird.
Now, we add the number of bird owners from both samples:
\[ 8 + 12 = 20 \text{ students who own a bird} \]
Next, we need to calculate the total number of students surveyed across both samples:
\[ 100 \text{ (Sample 1)} + 100 \text{ (Sample 2)} = 200 \text{ students} \]
Now we can calculate the percentage of students who own a bird:
\[ \text{Percentage} = \left(\frac{\text{Number of students who own a bird}}{\text{Total number of students}}\right) \times 100 \]
Substituting the values:
\[ \text{Percentage} = \left(\frac{20}{200}\right) \times 100 = 10% \]
Thus, based on the two samples, 10% of students own a bird as a pet.