A Normal Distribution Has a Mean of 500 and a Standard

question 19

Multiple Choice

A Normal distribution has a mean of 500 and a standard deviation of 50.A manager wants to simulate two values from this distribution,and has drawn these random numbers: -0.60 and +1.40.Respectively,the two values are:

• A) 640 and 440.
• B) 470 and 570.
• C) 570 and 470.
• D) 440 and 640.
• E) none of the choices are correct.

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Definitions:

External Validity

The degree to which the results of an experiment may be generalized.

Strong Manipulation

The application of a significant change or intervention in an experiment, aiming to produce a noticeable effect on the dependent variable.

Internal Validity

The certainty with which results of an experiment can be attributed to the manipulation of the independent variable rather than to some other, confounding variable.

Ceiling Effect

Failure of a measure to detect a difference because it was too easy (also see floor effect).