What percentage of college students report frequent severe sleep disturbances such as insomnia and insufficient sleep?

Statistical procedures that summarize and describe a series of observations are called a. inferential statistics. b. descriptive statistics. c. scales

d. ratios.

Anna's doctor is looking at the activity in her prefrontal cortex and the size of her ventricles to determine possible causes of her schizophrenia. Anna's doctor endorses the __________ view of schizophrenia

a. psychodynamic c. biological b. learning d. cognitive