When a researcher moves from a 95% confidence level to a 90% confidence level, the confidence interval for the mean becomes ______.
A) wider
B) normally distributed
C) statistically significant
D) narrower

Question

Quizplus · Accepted Answer

When a researcher moves from a 95% confidence level to a 90% confidence level, the confidence interval becomes narrower because less certainty (or a lower confidence level) requires a smaller range to capture the true population parameter.

When a Researcher Moves from a 95% Confidence Level to a 90