what-is-the-effect-of-increasing-the-confidence-level-from-95-to-999-on-the-widt

Question

What is the effect of increasing the confidence level from 95% to 99.9% on the width of the confidence interval?

Accepted Answer

The width increases because the t-value increases.

Answer

The width decreases because the standard deviation decreases.

Answer

The width remains the same because the sample size is unchanged.

Answer

The width decreases because the t-value decreases.