Plasma Homocysteine Levels Are Measured in Patients with Acute Coronary

question 72

Multiple Choice

Plasma homocysteine levels are measured in patients with acute coronary syndrome who are treated at a large community hospital.  The mean plasma homocysteine level in this group is determined to be 11.1 µmol/L with a standard deviation of 1.2 µmol/L.  In a separate group of patients hospitalized on the general ward in the same hospital, the mean plasma level is 9.5 µmol/L and the standard deviation is 1.3 µmol/L.  Which of the following statistical methods should be used to compare the mean homocysteine levels of these 2 groups of patients?

• A)Two-sample t test
• B)Linear regression
• C)Correlation coefficient
• D)Chi-square test
• E)Meta-analysis

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Definitions:

Maximum Profit

The highest possible financial gain that can be achieved by a business or investor, calculated by maximizing the difference between total revenue and total costs.

Yellowfin Tuna

A species of tuna known for its yellow fins and high nutritional value, often used in sashimi and other dishes.

Marginal Cost

The price of creating an additional unit of any given product or service.

Profit-Maximizing Monopoly

A monopoly that adjusts its output level to where marginal costs equal marginal revenues to achieve the highest possible profit.