In an Effort to Decide If There Is an Association

question 118

Essay

In an effort to decide if there is an association between the year of a postal increase and the new postal rate for first class mail, the data were gathered from the United States Postal Service. In 1981, the United States Postal Service changed their rates on March 22 and November 1. This information is shown in the table below.

$\begin{array}{|c|c|}\hline \text {Year} & \text {Rate} \\\hline 1971 & 0.08 \\\hline 1974 & 0.10 \\\hline 1975 & 0.13 \\\hline 1978 & 0.15 \\\hline 1981 & 0.18 \\\hline 1981 & 0.20 \\\hline 1985 & 0.22 \\\hline 1988 & 0.25 \\\hline 1991 & 0.29 \\\hline 1995 & 0.32 \\\hline\end{array}$

-Make a scatterplot and describe the association between the year and the first class postal rate.

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Definitions:

Total Liabilities

The aggregate of all debts and financial obligations owed by a company to external entities at any point in time.

Owner's Equity

The residual interest in the assets of a business after deducting its liabilities, representing the owner's claim against the company's assets.

Total Assets

The sum of all assets owned by a company, including current, non-current, tangible, and intangible assets, reflected on the balance sheet.

Period Of Time

A period of time is a specified duration or a length of time during which events, processes, or conditions occur or continue.