Confidence Intervals for the Slope of a Regression Model

AP Statistics· difficulty 4/5

A wider 95% CI for slope may result from

A
$Larger SE(b) (more residual scatter, less x-spread, smaller n)$
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B
$Larger n alone$
C
$Smaller s$
D
$Larger Σ(x - x̄)²$

Explanation

Width = 2\cdott*\cdotSE(b); SE depends on s, x-spread, and n.

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