A meteorologist is studying the monthly rainfall in a section of the Brazilian rainforest. She recorded the monthly rainfall, in inches, for last year:
1.8, 2.5, 2.6, 4.4, 4.4, 7.3, 8.0, 9.5, 10.3, 10.4, 11.1, 11.7
For this data set:
[tex]\[
\begin{aligned}
\mu &= 7, \\
N &= 12, \\
\sigma^2 &= \frac{\left(x_1 - \mu\right)^2 + \left(x_2 - \mu\right)^2 + \ldots + \left(x_N - \mu\right)^2}{N} \\
\sigma^2 &= \frac{(1.8 - 7)^2 + (2.5 - 7)^2 + \ldots + (11.7 - 7)^2}{12}
\end{aligned}
\][/tex]
Fill in the missing values in the formula. What is the variance?
A. 0
B. 3.217
C. 3.522
D. 12.405
E. 148.86