A study investigated dietary intake of calcium among a cross section of healthy women ages 20-88. The researchers formed four age groupings as follows: Group A, 20.0-45.9 years; group B, 46.0-55.9 years; group C, 56.0-65.9 years; and group D, over 66 years. Calcium from food intake was measured in mg/day. To determine if there is a significant difference between the three age groups, what statistical test should they use?

		One sample t-test
		Two-sample t-test
		ANOVA
		Dependent t-test