Calculate the standard error of estimate

Which of these doesn't involve genetic abnormalities?

a. Cultural-familial retardation b. Down syndrome c. Fragile-X syndrome d. Phenulketonuria

A survey by the American College Health Association in 2003 found that approximately ____ percent of students reported feeling a level of depression that made it difficult to function.

a.) 20 b.) 40 c.) 60 d.) 80