The Monthly Cost of Driving a Car Depends on the Number

question 38

Multiple Choice

The monthly cost of driving a car depends on the number of miles driven. Julia found that in October it cost her to drive mi and in July it cost her to drive mi. Express the monthly cost C as a function of the distance driven d assuming that a linear relationship gives a suitable model.

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Definitions:

Cronbach's Alpha

A coefficient of reliability or internal consistency of a psychometric instrument, indicating how well the items in the test measure the same concept or construct.

Internal Consistency Reliability

A measure of how well the items on a test measure the same concept or construct, often assessed by Cronbach's alpha.

Parallel Forms Reliability

The consistency of the results of two tests constructed in the same way from the same content domain.

Internal Validity

The extent to which a study establishes a trustworthy cause-and-effect relationship between a treatment and an outcome.