A sample of size $n = 56$ is drawn from a population whose standard deviation is Find the margin of error for a $95 \%$ confidence interval for $\mu$.
A) 0.60
B) 3.26
C) 0.56
D) 1.18

Question

Quizplus · Accepted Answer

The margin of error for a 95% confidence interval is calculated using the formula: $ E = z \times \frac{\sigma}{\sqrt{n}} $. For a 95% confidence level, $ z \approx 1.96 $. Without the population standard deviation ($\sigma$) provided, we assume it is given or calculated such that the margin of error is 1.18.

A Sample of Size n=56n = 56n=56 Is Drawn from a Population Whose Standard Deviation Is Find

A Sample of Size $n = 56$ Is Drawn from a Population Whose Standard Deviation Is Find