When a researcher chooses the 90% confidence level instead of the 95% confidence level, which of the following would be true for their decision?
A) The width of the confidence interval would be less precise.
B) The width of the confidence interval would be the same.
C) The width of the confidence interval would be larger.
D) The width of the confidence interval would be smaller.

Question

Quizplus · Accepted Answer

Choosing a 90% confidence level instead of a 95% confidence level results in a narrower (smaller) confidence interval because it reflects a lower degree of certainty about the estimate, thus requiring less range to capture the true parameter.

When a Researcher Chooses the 90% Confidence Level Instead of the 95