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: $$\begin{array} { l l l l l l l }
40 & 20 & 31 & 21 & 12 & 55 & 75
\end{array}$$
A) 12,196
B) 9216.6
C) 22.3
D) 31

Question

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: $$\begin{array} { l l l l l l l } 
40 & 20 & 31 & 21 & 12 & 55 & 75
\end{array}$$
A) 12,196
B) 9216.6
C) 22.3
D) 31

Quizplus · Accepted Answer

The standard deviation is calculated by finding the square root of the variance. First, find the mean of the scores, then calculate the variance by averaging the squared differences from the mean, and finally take the square root of the variance to get the standard deviation, which is approximately 22.3.

Find the Standard Deviation for the Given Sample Data 40203121125575\begin{array} { l l l l l l l } 40 & 20 & 31 & 21 & 12 & 55 & 75\end{array}40​20​31​21​12​55​75​

Find the Standard Deviation for the Given Sample Data $\begin{array} { l l l l l l l } 40 & 20 & 31 & 21 & 12 & 55 & 75\end{array}$