Observational Experiment or Simulation

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

• simulation

• survey

• randomization

• replication

person observes and measures characteristic without changing the conditions

• observational study

• experiment

• treatment

Measures variables without controlling the individuals or their environment

• Experiment

• Observational study

• Survey

• Simulation

What data collection method was used?

• Observational Study

• Experiment

• Survey

• Simulation

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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In an ________________, a researcher observes and measures characteristics of interest of part of the population but does not change existing conditions.

• Experiment

• Observational Study

An ​ (a)   does not have treatments imposed.

An ​ (b)   has treatments imposed.

• Observational Study

• Experiment

Researchers wanted to know if there is a link between proximity to high-tension wires and the rate of leukemia in children. To conduct the study, researchers compared the rate of leukemia for children who lived within 1/2 mile of high-tension wires to the rate of leukemia for children who did not live within 1/2 mile of high-tension wires.

• Observational Study

• Experiment

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

• experiment

• double blind

• observational study

• placebo

You want to see if students who have a 4.0 grade point average study more than those who do not.

• experiment

• observational study