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

Question

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

Quizplus · Accepted Answer

The standard deviation of the weight is 3. This can be calculated by finding the square root of the variance, which is the average of the squared differences between each data point and the mean. The mean weight is 7, so the squared differences are (7-7)^2 = 0, (4-7)^2 = 9, and (10-7)^2 = 9. The variance is (0+9+9)/3 = 6, and the standard deviation is the square root of 6, which is 3.

Use the Following to Answer Questions the Height and Weight

Use the Following to Answer Questions
the Height and Weight