Scores on a Chemistry Exam Were Mound-Shaped with a Mean

question 4

Multiple Choice

Scores on a chemistry exam were mound-shaped with a mean score of 90 and a standard deviation of 64. Scores on a statistics exam were also mound-shaped, with a mean score of 70 and a standard deviation of 16. A student who took both exams achieved a grade of 102 on the chemistry exam and a grade of 77 on the statistics exam. Which of these may be inferred from the information given?

• A) The student did relatively better on the chemistry exam than on the statistics exam, compared to the other students in each class.
• B) The student did relatively better on the statistics exam than on the chemistry exam, compared to the other students in the two classes.
• C) The student's scores on both exams are similar when accounting for the scores of the other students in the two classes.
• D) Without more information it is impossible to say which of the student's exam scores indicates the better performance.

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Definitions:

Neurotransmitter

Chemical substances that transmit nerve impulses across a synapse from one neuron to another.

Synaptic Vesicles

Membrane-bound sacs within the neuron that store neurotransmitters, which are chemicals involved in transmitting messages across the synaptic gap.

Resting Potential

The electrical charge of a neuron when it is not active or transmitting an impulse, representing the difference in electric potential across the neuron's membrane.

All-Or-None

Referring to the fact that a neuron either fires completely or does not fire at all.