Which of the following is most useful in establishing cause-and-effect relationships?
A.
A complete census
B.
A least squares regression line showing high correlation
C.
A simple random sample
D.
A well-designed, well-conducted survey incorporating chance to ensure a representative sample
E.
An experiment
Exam No：AP Statistics Problem Set 1 Year：2024 Question No：2
Answer:
E
Knowledge points:
3.5 Introduction to Experimental Design
3.6 Selecting an Experimental Design
Solution:
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