Five Hundred Randomly Selected Automobile Owners Were Questioned on the Main

question 62

Essay

Five hundred randomly selected automobile owners were questioned on the main reason they had purchased their current automobile. The results are given below.
$\begin{array}{lcccc}&\text { Styling } &\text { Engineering} &\text {Fuel Economy }&\text {Total }\\\text { Male } & 70 & 130 & 150 & 350 \\\text { Female } & \underline{30} & \underline{20} & \underline{100} & \underline{150} \\\text { Total } &100&150 &250&500\end{array}$

a. State the null and alternative hypotheses for a contingency table test.
b. State the decision rule for the critical value approach. Let ? = .01.
c. Calculate the ?2 test statistic.
d. Give your conclusion for this test.

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Definitions:

Emotional Part

A component of human psychology that involves feelings, moods, and affective states.

Rational Part

The aspect of the human mind or personality that is responsible for logic, reasoning, and analytical thought.

Id

In psychoanalytic theory, the part of the psyche that is the source of instinctual drives and desires, operating on the pleasure principle.

Psychoanalytic Theory

A theory of personality and a method of psychotherapy, originally formulated by Sigmund Freud, that emphasizes unconscious motivations and conflicts.