TABLE 16-2
the Monthly Advertising Expenditures of a Department

question 185

Essay

TABLE 16-2
The monthly advertising expenditures of a department store chain (in $1,000,000s) were collected over the last decade. The last 14 months of this time series follows:
$$\begin{array}{l}\begin{array} {cc } \text { Month}&\text { Expenditures } ( \$ )\\ \hline 1 & 1.4 \\2 & 1.8 \\3 & 1.6 \\4 & 1.5 \\5 & 1.8 \\6 & 1.7 \\7 & 1.9 \\8 & 2.2 \\9 & 1.9 \\10 & 1.9 \\11 & 2.1 \\12 & 2.4 \\13 & 2.8 \\14 & 3.1\end{array}\end{array}$$
-Referring to Table 16-2, set up a scatter diagram (i.e., time-series plot) with months on the horizontal X-axis.

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