A researcher's results are shown below using n = 25 observations. Which is the 95 percent confidence interval for the slope?
A)[−3.282,−1.284]
B)[−4.349,−0.217]
C)[1.118,5.026]
D)[−0.998,+0.998]

Question

A researcher's results are shown below using n = 25 observations.  Which is the 95 percent confidence interval for the slope?
A)[−3.282,−1.284] 
B)[−4.349,−0.217] 
C)[1.118,5.026] 
D)[−0.998,+0.998]

Quizplus · Accepted Answer

Since the 95% confidence interval for the slope does not contain zero, we can conclude that the slope is statistically significant. The correct choice is B because it is the only interval that does not contain positive values for the slope. Additionally, it has a larger range than the other intervals, indicating a greater level of uncertainty in the estimate of the slope.

A Researcher's Results Are Shown Below Using N = 25