During the Years 1994 to 2007 Seat Belt Use Among

question 39

Multiple Choice

During the years 1994 to 2007 seat belt use among front seat passengers ages 16 to 24 has increased. A linear model for the percentage of these passengers who use a seat belt is where P is percentage with a seat belt and t is years since 2000. The years before 2000 have a negative value for t. What is the slope of the model and what does it mean in terms of the problem?

• A) 2.33. Every year seat belt use goes down 2.33.
• B) 2.33. Every year seat belt use goes down 2.33%
• C) 2.33. Every year seat belt use goes up 2.33%
• D) 64.60. Seat belt use started at 64.60%

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Definitions:

Proportion of Employee

A ratio or fraction that represents the number of employees in a particular category relative to the total number of employees.

Commute by Car

The act of traveling between one's home and workplace or school by automobile.

Confidence Interval

A range of values, derived from statistical analysis, that is likely to contain the true value of an unknown parameter with a certain level of confidence.

Incentive Program

A plan or approach aimed at promoting certain behaviors or activities by providing incentives or advantages.