Introducing Statistics: Do Those Points Align?

AP Statistics· difficulty 4/5

A regression of GPA on SAT score has slope 0.001 (95% CI: 0.0005 to 0.0015).

Does this CI prove SAT causes higher GPA?

A
$Yes; slope is significant$
B
$No; SAT is unrelated to GPA$
C
$Yes; CI does not contain 0$
D
$No; this is observational data, so causation cannot be inferred$
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Explanation

Statistical significance shows an association, but observational data cannot establish causation without experimental design.

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