A Researcher Computes a

question 51

Multiple Choice

A researcher computes a .95 confidence interval for an experimental group to be 3.0 B 7.0,and computes a .95 confidence interval for a control group to be 0.0 B 4.0.Based on these confidence intervals,the researcher can state that

• A) the results for the effect of the independent variable on the dependent variable are inconclusive.
• B) the independent variable definitely influenced participants' scores on the dependent variable because the confidence interval for the experimental group is higher than that that of the control group.
• C) the independent variable definitely did not affect participants' scores because the confidence interval for the control group includes zero.
• D) the population value for the experimental group is .95.

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Definitions:

Marginal Cost

The cost of producing one additional unit of a good or service, often varying with the level of production.

Fixed Cost

Expenses that do not change with the level of production or sales, such as rent or salaries.

Total Fixed Costs

The sum of all costs that remain constant regardless of any change in a company's production volume.

Diminishing Returns

A principle stating that if one input in the production of a commodity is increased while other inputs are held fixed, a point will eventually be reached at which additions of the input yield progressively smaller, or diminishing, increases in output.