Suppose That $\bar{x}=81$ Is Being Used as an Estimate of the True Average

Multiple Choice

Suppose that $\bar{x}=81$ is being used as an estimate of the true average score for students' first exam in psychology. What can be said with $95 \%$ confidence about the maximum error if $n=11$ and $s=5$ ?

A) $E \approx 2.73$
B) $E \approx 3.32$
C) $E \approx 3.36$
D) $E \approx 2.71$