Interpreting a Confidence Interval for Slope
A 90% confidence interval for the slope of a regression model relating study time to exam score is (1.2, 3.8). Based on this interval, what conclusion should be drawn about the claim that each additional hour of study increases the mean exam score by at least 2 points?
A
The claim is refuted since the lower bound exceeds 0
B
No conclusion can be drawn without the p-value
C
The claim is not supported since parts of the interval are below 2
D
There is insufficient evidence to support the claim
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