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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