Jake and Jack Are Both Interested in the Effect of the Loud

question 230

Multiple Choice

Jake and Jack are both interested in the effect of the loud music from the dorm room next door on their grades. Jake records the days and hours the music is loud and compares that information to the grades he received on exams taken the days following the loud music. Jack plays his own music loud before his first psychology exam and quietly
Before his second exam. He then compares his exam scores. The primary difference in the way Jake and Jack conducted their research is:

• A) Jack had fewer types of data than did Jake.
• B) Jake took more accurate measurements than Jack.
• C) Jake used correlational data and Jack manipulated a variable.
• D) Jack only looked at psychology exams and Jake used several courses.

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Definitions:

Coefficient of Determination

A statistic that indicates the proportion of the variance in the dependent variable that is predictable from the independent variable(s).

Battery Life

The duration for which a battery can operate before it needs recharging or replacement.

Service Time

The duration it takes to complete a specific task or service, often measured to evaluate efficiency or productivity in various sectors.

Degrees of Freedom

The number of independent pieces of information available to estimate another piece of information or parameter within a dataset.