Pretend That You Want to Determine the Relationship Between Caffeine

question 95

Multiple Choice

Pretend that you want to determine the relationship between caffeine intake and performance on a midterm exam.As students sit down to take the exam,you ask them to write the number of cups of tea,soda,or coffee they ingested two hours prior to the exam.You also obtain their exam scores.You calculate the correlation coefficient between the two variables to be +0.82.What can you conclude?

• A) The more caffeine students consumed, the better their scores.
• B) 82 percent of the students consumed caffeine prior to the exam.
• C) Students with low scores didn't consume caffeine.
• D) Students who drink caffeine are smarter than those who don't drink caffeine.

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Definitions:

Accumulated Degree Hours

A measurement used in forensic entomology and agriculture to estimate the growth and development rates of organisms by accumulating temperature over time.

Larva

A larva is the juvenile form of many animals, which undergoes metamorphosis before becoming an adult, often differing markedly in form and behavior from the adult stage.

Develop

To undergo gradual growth or formation; often refers to the process of bringing new products, technologies, or ideas into existence.

Accumulated Degree Hours

A measure used in forensic entomology and agriculture to estimate the development stage of organisms by accumulating the degrees above a threshold temperature over time.