Dr. Jones wants to determine whether women who smoke while pregnant will have children with more respiratory problems than those born to mothers who do not smoke. The reason Dr. Jones cannot conduct an experiment is because
a. women in the control group might still have children with respiratory problems.
b. the placebo group needs to be given cigarettes as well.
c. women in the control group would be manipulated.
d. assignment of women to the experimental group would be unethical.
D
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Indicate whether the statement is true or false
Empathy is the capacity to understand another person's emotions.
Answer the following statement true (T) or false (F)
Which inherited blood-clotting disorder has been a problem throughout the royal families of Europe?
A. X-linked arrhythmia B. phenylketonuria (PKU) C. Down syndrome D. hemophilia
Suppose you asked the following two questions of a group of 100 children: "How much time do your parents spend reading to you each day?" and "What are your grades in school?" You find that children whose parents read to them for more than one hour each day have better grades than children whose parents read to them for only a few minutes each day. What could you conclude from this pattern of data?
A. Better students cause their parents to spend more time reading to them. B. Parental reading time and grades are positively correlated. C. Reading by parents causes children to do better in school. D. Parental reading time and grades are uncorrelated.