Observational Experiment Simulation

Four groups of randomly selected people are assigned a different diet. After six months, the blood pressures of each group are compared.

• Observational Study

• Experiment

person observes and measures characteristic without changing the conditions

• observational study

• experiment

• treatment

using a mathematical or physical model to reproduce the conditions of a study

• simulation

• survey

• randomization

• replication

treatment is imposed upon a subject and a response is recorded

• observational study

• experiment

• treatment

Suppose that 25 percent of women and 22 percent of men would answer yes to a particular question. In a simulation, a random sample of 100 women and a random sample of 100 men were selected, and the difference in sample proportions of those who answered yes, was calculated. The process was repeated 1,000 times. Which of the following is most likely to be a representation of the simulated sampling distribution of the difference between the two sample proportions?

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Individuals are monitored for measures of variables of interest but not influenced in response.

• Observational Study

• Experiment

• Voluntary Response

• Single-Blind

Steven observed students entering a classroom for class and recorded whether the first half of the students who arrived for class chose to sit in the front half of the room.

What data collection method was used?

• Observational Study

• Experiment

• Survey

• Simulation

An ​ (a)   does not have treatments imposed.

An ​ (b)   has treatments imposed.

• Observational Study

• Experiment

Observes individuals and measures variables of interest but does not attempt to influence the responses.

• experiment

• double blind

• observational study

• placebo

Measures variables without controlling the individuals or their environment

• Experiment

• Observational study

• Survey

• Simulation