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.)
Pregnant nonvegetarians
Pregnant vegetarians
Nonpregnant vegetarians
185
171
139
189
174
172
187
186
198
181
171
177
176
150
163
207
125
153
210
189
179
174
184
160
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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