Considerable increase in synaptic connections occurs around the time puberty begins during a process neuroscientists call ____

Which of the following is considered as medium correlation?

a. r = .25 b. r = .43 c. r = .62 d. r = .81

The hypothesis predicting that differences exist between the groups being compared is the _____ hypothesis, and the hypothesis predicting that no differences exist between the groups being compared is the _____ hypothesis

a. null; alternative b. alternative; null c. one-tailed; two-tailed d. two-tailed; one-tailed