Surveys, Observational Studies and Experiments

210 college students were randomly assigned to play either a violent or nonviolent video game.  A short time later, the students were presented with the opportunity to trivially harm another person and results comparing the two groups were recorded.
Is this study OBSERVATIONAL or EXPERIMENTAL? 

• Observational

• Experimental

A recent survey found that out of 400 random American adults, 89% pay their bills on time. The margin of error in this survey was 2%. What is the interval of values in which the truth is likely found?

• 89% - 91%

• 87% - 89%

• 87% - 91%

• 388 - 402

A(n) ____________________ is a method of data collection that involves asking questions to a sample of individuals from a population.

• survey

• experiment

• observation

• interview

In a(n) ____________________ study, researchers observe and measure variables without manipulating any factors.

• experimental

• observational

• theoretical

• clinical

A(n) ____________________ involves manipulating one or more variables to determine their effect on a dependent variable.

• survey

• observation

• experiment

• case study

A researcher wants to determine the average time high school students spend on homework each night. Which method would be most appropriate?

• Experiment

• Sample survey

• Observational study

• Secondary data analysis

Which of the following is an example of an experiment?

• Surveying students about their favorite school subjects

• Observing the migration patterns of birds over a year

• Testing the effectiveness of a new acne medication on volunteers

• Analyzing existing data on car accident rates in different weather conditions

What type of study is being conducted when researchers observe and record the natural behavior of wild chimpanzees without intervention?

• Sample survey

• Observational study

• Experiment

• Primary data collection