A Company Keeps Extensive Records on Its New Salespeople on the Premise

question 15

Essay

A company keeps extensive records on its new salespeople on the premise that sales
should increase with experience. A random sample of seven new salespeople produced
the data on experience and sales shown in the table. $\begin{array}{c|c}\text { Months on Job } & \begin{array}{c}\text { Monthly Sales } \\y \text { (\$ thousands) }\end{array} \\\hline 2 & 2.4 \\4 & 7.0 \\8 & 11.3 \\12 & 15.0 \\1 & .8 \\5 & 3.7 \\9 & 12.0\end{array}$

Summary statistics yield $S S _ { x x } = 94.8571 , S S _ { x y } = 124.7571 , S S _ { y y } = 176.5171 , \bar { x } = 5.8571$ , and $\bar { y } = 7.4571$ . Using $S S E = 12.435$ , find and interpret the coefficient of determination.

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Definitions:

Elderly Patient

An older adult, typically over the age of 65, who may require specialized medical care.

Role Performance

A person's conduct in fulfilling a particular social role, including responsibilities and expected behavior.

Hypertension

A medical condition characterized by consistently high blood pressure levels, increasing the risk of heart disease and stroke.

Self-concept

The understanding and perception that an individual has of themselves, encompassing beliefs, feelings, and thoughts about one's abilities and identity.