Find the Confidence Interval Specified $\begin{array} { l l l l l l } 87.4 & 86.9 & 89.9 & 78.3 & 75.1 & 70.6\end{array}$

Find the confidence interval specified. Assume that the population is normally distributed.
-The principal randomly selected six students to take an aptitude test. Their scores were: $\begin{array} { l l l l l l } 87.4 & 86.9 & 89.9 & 78.3 & 75.1 & 70.6\end{array}$ Determine a 90% confidence interval for the mean score for all students.

A) 74.85 to 87.89
B) 87.89 to 74.85
C) 74.95 to 87.79
D) 87.79 to 74.95

Correct Answer:

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