To find out which sample had the greatest proportion of students with at least one pet, we can calculate the proportion for each sample by dividing the number of students with at least one pet by the total number of students in the class.
Here are the calculations for each sample:
-
Sample 1:
- Total Students: 19
- Students with Pets: 11
- Proportion = 11/19 ≈ 0.5789 (or 57.89%)
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Sample 2:
- Total Students: 22
- Students with Pets: 12
- Proportion = 12/22 ≈ 0.5455 (or 54.55%)
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Sample 3:
- Total Students: 17
- Students with Pets: 11
- Proportion = 11/17 ≈ 0.6471 (or 64.71%)
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Sample 4:
- Total Students: 18
- Students with Pets: 9
- Proportion = 9/18 = 0.5 (or 50%)
Now comparing the calculated proportions:
- Sample 1: 57.89%
- Sample 2: 54.55%
- Sample 3: 64.71%
- Sample 4: 50%
The greatest proportion of students with at least one pet is in Sample 3 (approximately 64.71%).
Thus, the answer is: sample number 3.