Which of the following should be analyzed using paired-samples t test (as oppose to independent-samples t test)?
1. Comparing the level of stress that students experienced just before
an exam was handed out and the level of stress after they handed
in the completed exam
2. Comparing the level of extraversion between identical twins
3. Comparing the number of hours of watching TV by children from
high versus low socioeconomic status families
1 only

You're doing research for a public essay on alternative medicine. which of the following sources has the most reliable information? a. a post on a social networking site about the undesired side-effects of different alternative medicinesb. a recent government report comparing the results of alternative and contemporary medicine for a specified diseasec. an anonymous article on a medical website that claims the success of alternative medicined. a 2003 study conducted by a medical research center about the effects of alternative medicine

Chen's research team randomly assigned some newborns and their mothers either to a breastfeeding promotion group (where breastfeeding was encouraged, but not required) or to a normal pediatric care group (where breastfeeding was neither encouraged nor discouraged). which research method did they use?

The romans believed every human being deserved rights, even slaves. true or false