Previous studies suggest that vegetarians may not receive enough zinc in their diets. As the zinc requirement is particularly important during pregnancy, researchers conducted a study to determine whether vegetarian pregnant women are at greater risk from low zinc levels than are non-vegetarian pregnant women.
24 women were monitored. The following table presents the zinc levels (ug/g) in the hair of three groups of women. (Data from J. C. King. Nutrition 34 (1981): 1049-1055.)
How many degrees of freedom for the Between Groups calculation? 1.—–
How many degrees of freedom for the Within Groups calculation? 2.—–
F = 3.—–
Critical value of F = 4.—– (use alpha = 0.05)
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