Sample variances are always pooled when computing independent samples t-tests

A key idea in the discussion on the universality versus diversity in psychiatric diagnoses was that

A) all disorders are found throughout all cultures of the world. B) many psychiatric disorders are similar across cultures. C) most psychiatric disorders are unique to specific cultures and relatively unknown in others. D) psychiatric disorders found in the United States and European countries are often unknown in many African and Asian cultures.

Natalie is a girl with congenital adrenal hyperplasia. She will most likely

A) show lower activity levels than other girls. B) prefer girls as playmates more than boys. C) experience an insecure gender identity. D) prefer cars, trucks, and blocks more than dolls.