In a randomized trial, 500 participants were randomized into 1 of 3 study arms - olive oil only, olive oil plus nuts, and control diet and followed up for heart disease. The researchers wanted to see if the intake of saturated fatty acids (g/day) was different between the 3 study arms. Which of the following would be the best statistical test to examine this association.

Select one:

a.

ANOVA

b.

Chi-square test of independence

c.

2-sample t-test of means

d.

Paired t-test