Researchers were interested in the effects of maternal stress on infants\' produ
ID: 3067333 • Letter: R
Question
Researchers were interested in the effects of maternal stress on infants' production of stress hormones. They measures the level of the hormone "cortisol" in infant saliva when all the infants were 9 months old. The mothers were categorized according to the amount and type of stress they experienced while pregnant. One group of mothers reported no extraordinary stressors while pregnant. One group of mothers were living in the New York City area when the terrorist attack on the twin towers happened on Sept 11, 2001. They were all between 2 and 4 months pregnant with the infant in the study during that day. The third group of mothers were refugees fleeing a war in their country. They all lived in a refugee camp for the entire time that they were pregnant with the infant in the study but were resettled in the United States within 2 months of the child's birth. The researchers hypothesized that chronic (refugees) or severe (9/11) stressors during pregnancy would impact the stress hormone production in the child long after birth. What type of test should they use to test this hypothesis?
an ANOVA
a single sample t-test
an independent samples t-test
a dependent samples t-test
a z-test
an ANOVA
a single sample t-test
an independent samples t-test
a dependent samples t-test
a z-test
Explanation / Answer
Ans:
As,there are 3 groups(more than 2 groups) which are being measured,so we will use an ANOVA test.
The one-way analysis of variance (ANOVA) is used to determine whether there are any statistically significant differences between the means of two or more independent (unrelated) groups
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.