The __________ rate of schizophrenia is high; if one twin has it, the other twin is likely to have it as well.

Which type of love is defined as a transitory form characterized by strong emotional reactions, sexual desires, and fantasies?

a) seductive b) passionate c) friendship d) companionate

When all samples are drawn from a single population, the mean of the

distribution of differences should approximate a. zero b. +1.0 c. -1.0 d. the mean of the distribution of means