What is the confidence level of the following confidence interval for $\mu$ ?
$$\bar { x } \pm 1.645 \left( \frac { \sigma } { \sqrt { n } } \right)$$
A) $98 \%$
B) $90 \%$
C) $165 \%$
D) $95 \%$

Question

Quizplus · Accepted Answer

The given formula $\bar { x } \pm 1.645 \left( \frac { \sigma } { \sqrt { n } } \right)$ represents a confidence interval for the population mean $\mu$ when the population standard deviation $\sigma$ is known and the sample size is $n$. The value 1.645 is the z-score corresponding to a 90% confidence level.

What Is the Confidence Level of the Following Confidence Interval μ\muμ

What Is the Confidence Level of the Following Confidence Interval $\mu$