Find the Margin of Error $\begin{array} { l l l l l l } 77.9 & 89.1 & 80.7 & 78.6 & 74.4 & 82.0 \end{array}$

Multiple Choice

Find the margin of error.
-The principal randomly selected six students to take an aptitude test. Their scores were: $\begin{array} { l l l l l l } 77.9 & 89.1 & 80.7 & 78.6 & 74.4 & 82.0 \end{array}$
Determine a 90 percent confidence interval for the mean score for all students.

A) $84.54 < \mu < 76.36$
B) $84.64 < \mu < 76.26$
C) $76.36 < \mu < 84.54$
D) $76.26 < \mu < 84.64$