Use the Following to Answer Questions
the Height and Weight

Multiple Choice

Use the following to answer questions
The height and weight for three dogs are shown below.
$\begin{array}{cc}Weight~ in ~kilograms&Height~ in~ centimeters\\7 & 22 \\4 & 12 \\10 & 30\end{array}$
-What is the standard deviation of the weight? Round to the nearest whole number.

A) 3
B) 9
C) 21
D) 42
E) 81