SCENARIO 12-8 a Study Was Conducted to Determine Whether the Use of Use

question 7

Multiple Choice

SCENARIO 12-8
A study was conducted to determine whether the use of seat belts in motor vehicles depends on the educational status of the parents.A sample of 792 children treated for injuries sustained from motor vehicle accidents was obtained,and each child was classified according to (1) parents' educational status (College Degree or Non-College Degree) and (2) seat belt usage (worn or not worn) during the accident.The number of children in each category is given in the table below.

-Referring to Scenario 12-8,at 5% level of significance,there is sufficient evidence to conclude that

• A)use of seat belts in motor vehicles is related to the educational status of the parents.
• B)use of seat belts in motor vehicles depends on the educational status of the parents.
• C)use of seat belts in motor vehicles is associated with the educational status of the parents.
• D)All of the above.

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Definitions:

Interval Estimation

A range within which a population parameter is estimated to lie, based on sample data and a certain level of confidence.

Standard Deviation

The statistic that measures the dispersion of a dataset relative to its mean and is calculated as the square root of the variance.

Margin of Error

A measure of the range of values below and above the sample statistic in a confidence interval.

Sample Mean

The average value of a sample set of numbers, estimated from a subset of a population.