In determining the necessary sample size for $95 \%$ confidence interval, the value 0.95 must be substituted into the formula for $z_{\alpha / 2}$.

Question

Quizplus · Accepted Answer

The value 0.95 refers to the confidence level, not directly to $z_{\alpha / 2}$. The $z_{\alpha / 2}$ value corresponds to the critical value from the standard normal distribution for a given confidence level, which for a 95% confidence interval is typically 1.96, not 0.95.

In Determining the Necessary Sample Size For 95%95 \%95% Confidence Interval, the Value 0

In Determining the Necessary Sample Size For $95 \%$ Confidence Interval, the Value 0