Sigma Notation and Calculating the Arithmetic Mean · Exercise 7

A city received the following rainfall for a recent year. What is the mean number of inches of rainfall the city received monthly, to the nearest hundredth of an inch? Use.

$$\begin{array}{cc}\text{Month}& \text{Rainfall in inches}\\ \text{January}& \text{2.21}\\ \text{February}& \text{3.12}\\ \text{March}& \text{4.11}\\ \text{April}& \text{2.09}\\ \text{May}& \text{0.99}\\ \text{June}& \text{1.08}\\ \text{July}& \text{2.99}\\ \text{August}& \text{0.08}\\ \text{September}& \text{0.52}\\ \text{October}& \text{1.89}\\ \text{November}& \text{2.00}\\ \text{December}& \text{3.06}\end{array}$$

OpenStax, Introductory Business Statistics 2e · §2.4 Sigma Notation and Calculating the Arithmetic Mean · Exercise 7