For a school newspaper article, Cienna conducted a survey to find out students’ favorite subjects. She polled all the students in Mrs. Lopez’s advanced dance class. Why is her data likely to be skewed?
Answer
A
Advanced dance students are more likely to enjoy dance than students in the general population, so dance will be underrepresented.
B
Cienna should have interviewed only every other student in the class to avoid having too many people.
C
Cienna should have interviewed all the students in the school to get more accurate data.
D
Advanced dance students are more likely to enjoy dance than students in the general population, so dance may be overrepresented.
Explanation
Cienna surveyed only students in an advanced dance class, which is not a representative sample of the whole school. Those students are especially likely to favor dance, so dance may be overrepresented in the results. This is why choice D is correct.
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