SCENARIO 13-19
the Marketing Manager for a Nationally Franchised Lawn

question 248

Multiple Choice

SCENARIO 13-19
The marketing manager for a nationally franchised lawn service company would like to study the characteristics that differentiate home owners who do and do not have a lawn service.A random sample of 30 home owners located in a suburban area near a large city was selected; 11 did not have a lawn service (code 0) and 19 had a lawn service (code 1) .Additional information available
concerning these 30 home owners includes family income (Income, in thousands of dollars) and lawn size (Lawn Size, in thousands of square feet) .
The PHStat output is given below:
Binary Logistic Regression $$\begin{array}{l}\begin{array} { l r r r r } \hline { \text { Predictor } } & \text { Coefficients } & \text { SE Coef } & { Z } & p \text {-Value } \\\hline \text { Intercept } & - 7.8562 & 3.8224 & - 2.0553 & 0.0398 \\\text { Income } & 0.0304 & 0.0133 & 2.2897 & 0.0220 \\\text { Lawn Size } & 1.2804 & 0.6971 & 1.8368 & 0.0662\\\text { Deviance } & 25.3089\end{array}\\\end{array}$$
-Referring to SCENARIO 13-19, which of the following is the correct interpretation for theIncome slope coefficient?

• A)Holding constant the effect of lawn size, the estimated number of lawn services purchased increases by 0.0304 for each increase of one thousand dollars in family income.
• B)Holding constant the effect of lawn size, the estimated average number of lawn services purchased increases by 0.0304 for each increase of one thousand dollars in family income.
• C)Holding constant the effect of lawn size, the estimated probability of purchasing a lawn service increases by 0.0304 for each increase of one thousand dollars in family income.
• D)Holding constant the effect of lawn size, the estimated natural logarithm of the odds ratio of purchasing a lawn service increases by 0.0304 for each increase of one thousand dollars in family income.

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Definitions:

Oxygen-Transporting Pigment

Molecules, such as hemoglobin in vertebrates, responsible for carrying oxygen from the respiratory organs to the rest of the body.

Hemocyanin

A copper-containing oxygen-transport protein found in the blood of some invertebrates, similar in function to hemoglobin in vertebrates.

Hemoglobin

A molecule found in red blood cells responsible for transporting oxygen from the lungs to the tissues of the body and bringing carbon dioxide back from the tissues to the lungs.

Hemolymph

A fluid equivalent to blood in most invertebrates, occupying the hemocoel and performing similar functions such as nutrient transport and waste removal.