In deciding whether or not to pool the variances in calculating a t score, one should consider

Which of the following is an example of the eugenics movement in the United States?

a. the selective breeding of people with high IQs b. the investigation of the human genome c. the forced sterilization of people with intellectual disabilities d. the establishment of Head Start programs

The term __________ is often used to refer to differences in income levels, but it also includes variables beyond financial resources

a) socioeconomic status b) class c) psychological stratification d) sociological level