Find the Standard Deviation for the Given Sample Data $$\begin{array} { l l l l l l l } 55 & 18 & 39 & 20 & 20 & 44 & 69\end{array}$$

Multiple Choice

Find the standard deviation for the given sample data. Round your answer to one more decimal place than is present in
the original data.
-Christine is currently taking college astronomy. The instructor often gives quizzes. On the past seven quizzes, Christine got the following scores: $$\begin{array} { l l l l l l l } 55 & 18 & 39 & 20 & 20 & 44 & 69\end{array}$$

A) 39
B) 12,367
C) 10,032.1
D) 19.7