Statistical Study

• -Observational Study Designed Experiment  An educational researcher used school records to determine that, in one school district,84% of children living in two-parent homes graduated high school while 75% of children living insingle-parent homes graduated high school.

• -Observational Study Designed Experiment  A clinic gives a drug to a group of ten patients and a placebo to another group of ten patients to find out if the drug has an effect on the patients' illness.