The Following Scatterplot Represents the Results of a Study Undertaken

question 12

Multiple Choice

The following scatterplot represents the results of a study undertaken by Chakrabarty et al. (2005) who were investigating glutamate levels in psychotropic drug-naive OCD patients and comparing them with psychiatrically normal controls. Findings were reported as follows for CSF glutamate levels in OCD patients compared to controls: F(1,29) =11.153, p = 0.002. How would these findings be interpreted? Scatterplot showing CSF glutamate levels in patients (1) and controls (2) .

• A) CSF glutamate levels are not significantly raised in OCD patients compared to normal controls.
• B) CSF glutamate levels are significantly raised in OCD patients compared to normal controls.
• C) CSF glutamate levels are unchanged in OCD patients compared to normal controls.
• D) None of the above.

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Definitions:

Break-even Sales

The amount of revenue from sales that exactly covers the fixed and variable costs of producing and selling a product, with no profit or loss.

Pretax Net Income

The amount of money a company has earned before taxes are deducted.

Fixed Costs

Expenses that do not fluctuate with the volume of production or sales, such as rent, salaries, and insurance.

Variable Costs

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