In 2006, 25.7% of all live births in the United States were to mothers under 20 years of age.  A sociologist claims that births to mothers under 20 years of age is decreasing.  She conducts a simple random sample of 70 births and finds that 16 of them were to mothers under 20 years of age.  Test the sociologist’s claim at the α = 0.2 level of significance. (a) Formulate the null and alternative hypotheses.

Which of the following statements about trends in U.S. families is NOT true?Group of answer choicesCohabitation is about ten times more common today than it was 30-40 years ago.Couples are marrying at older ages than at any other time in U.S. history.Births to unwed/single mothers have decreased sharply since 1970.The average age at which U.S. women have their first child is the highest in U.S. history.

An observational study will examine a possible relationship between the age of a woman when she marries and the number of children she has. Identify two factors that could be ethical issues or limitations.

How does the teen birthrate in the United States compare to that of other high-income countries?A.It is about the same.B.It is higher.C.It is much lower.D.It is slightly lower.

In the United States, the teen birth rate is __________ that of most other high-income countries.A.ten times higher thanB.considerably lower thanC.about the same asD.higher than

A new study from the Pew Research Center has revealed that in America most adults under 30 years old are now living with their parents The study says the number of 18 to 30 year-olds who live at home has hit an 80 year high Around 52 per cent or 26.6 million of young people are at home with one or both of their parents The research says that people staying at home___________a.Staticb.Decreasedc.None of the given otions is correctd.increased