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 may be overrepresented.
B
Cienna should have interviewed all the students in the school to get more accurate data.
C
Advanced dance students are more likely to enjoy dance than students in the general population, so dance will be underrepresented.
D
Cienna should have interviewed only every other student in the class to avoid having too many people.
Explanation
The students in an advanced dance class are not a representative sample of the whole school: they are especially likely to enjoy dance. As a result, their answers may make dance seem more popular than it is among students overall, so dance may be overrepresented. Choice A gives this reason; choice C reverses the effect.
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