Which of the following hormones is secreted by the ovaries?

What single change in the last several decades has had the largest positive effect on the average income of current elderly persons in the United States?

a. More women have worked, and so earn retirement income. b. Men are living longer, so there are more couples earning the higher male retirement incomes. c. Individual Retirement Accounts (IRAs) were created. d. Social Security benefits have significantly increased.

Compared to zero-order correlations between personality traits and risk of suicide, researchers have used multivariate approaches and found that multiple regression

a. complicates the overall assessment of the relation between personality traits and risk of suicide. b. has led to useful models regarding factors associated with risk of suicide. c. has led to identification of factors associated with risk of suicide but not to factors associated with student willingness to seek therapy. d. revealed that there were no important differences in willingness to seek therapy across racial or ethnic groups.