how-does-increasing-the-confidence-level-from-90-to-99-affect-the-width-of-the-c

Question

How does increasing the confidence level from 90% to 99% affect the width of the confidence interval?

Accepted Answer

The width increases because the t-value increases.

Answer

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

Answer

The width decreases because the t-value decreases.

Answer

The width decreases because the standard deviation decreases.