TABLE 14-14 An Automotive Engineer Would Like to Be Able to Predict

question 189

Short Answer

TABLE 14-14
An automotive engineer would like to be able to predict automobile mileages. She believes that the two most important characteristics that affect mileage are horsepower and the number of cylinders (4 or 6) of a car. She believes that the appropriate model is
Y = 40 - 0.05X₁ + 20X₂ - 0.1X₁X₂
where X₁ = horsepower
X₂ = 1 if 4 cylinders, 0 if 6 cylinders
Y = mileage.
-Referring to Table 14-14, the predicted mileage for a 300 horsepower, 6-cylinder car is ________.

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Definitions:

Group Being Studied

The specific collection of subjects or participants who are observed or experimented on in a research study.

Naturalistic Observation

Naturalistic Observation is a research method in which subjects are observed in their natural environment without any manipulation by the researcher.

Exact Descriptions

Involves providing detailed and precise details or accounts of something.

Correlation

A statistical measure that indicates the extent to which two or more variables fluctuate together; a positive correlation means they increase or decrease together, while a negative correlation means one increases as the other decreases.