Q:

What is a fair test?

A:

A “fair test” refers to an experiment that is carefully controlled to ensure that the information gathered is reliable. Fair tests are used in the fields of science, psychology and medicine, among other disciplines. To guarantee the validity of an experiment, a control group is utilized, biases are limited, interfering variables are controlled and an adequate sample size is used.

A control group is used to give the results of the experimental group a standard to which to compare them. In an experiment to determine the effectiveness of a particular medication in relieving headaches, for example, the control group receives a placebo. To prevent biases, the participants are not told whether or not they are getting the actual medication. If participants in the control group know that they are taking a placebo, they might monitor their headaches less intently.

A large sample size of participants is required, because if there are too few people in the control and experimental groups, the statistical margin of error overwhelms the results of the test.

All participants in the experiment also agree to control variables that could lessen or increase headaches, like diet and exercise. This prevents those variables from interfering with the results.

Learn More

Related Questions

  • Q:

    How long is the SAT test?

    A:

    As of 2014, the SAT test takes three hours and 45 minutes to complete. The SAT test is broken into 10 timed sections that include three critical reading tests, three writing tests, one mathematics test and one variable test that is not scored.

    Full Answer >
    Filed Under:
  • Q:

    What are BLS test questions?

    A:

    As noted by the American Heart Association, BLS, or basic life support, test questions center on providing basic life support in an emergency situation. Areas of focus on a BLS test include CPR, rescue breathing, choking relief and using an automated external defibrillator, or AED, for adults, children and infants.

    Full Answer >
    Filed Under:
  • Q:

    What is a presumptive test?

    A:

    Presumptive tests are used to determine whether a specific chemical is present in a solution. These tests are commonly used to detect whether someone has drugs in their system.

    Full Answer >
    Filed Under:
  • Q:

    What is the ACT test?

    A:

    The ACT test is a standardized test accepted by colleges and universities to determine if students have the knowledge level for entrance into a higher education institution. The ACT tests students on science, mathematics, English and reading. "ACT" stands for "American College Testing."

    Full Answer >
    Filed Under:

Explore