A 95% Confidence Interval Estimate for a Population Mean $\mu$ Is Determined to Be 43

Short Answer

A 95% confidence interval estimate for a population mean $\mu$ is determined to be 43.78 to 52.19. If the confidence level is decreased to 90%, the confidence interval $\mu$ : $\begin{array}{|l|l|}\hline A&\text {becomes wider. }\\\hline B&\text {remains the same. }\\\hline C&\text {becomes narrower. }\\\hline D&\text {None of these choices are correct. }\\\hline \end{array}$