A Test Is Conducted to Compare Three Different Income Tax

question 123

Multiple Choice

A test is conducted to compare three different income tax software packages to determine whether there is any difference in the average time it takes to prepare income tax returns using the three different software packages. Ten different person's income tax returns are done by each of the three software packages and the time is recorded for each. Which of the following is true?

• A) The total degrees of freedom is 30.
• B) The between blocks degrees of freedom is 2.
• C) The between samples degrees of freedom is 2.
• D) The three software packages are the blocks.

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Definitions:

Internal Validity

The extent to which a study can rule out or make unlikely alternative explanations of the results, indicating that the causal relationship being tested is trustworthy.

Construct Validity

The degree to which a test or instrument accurately measures the theoretical construct it is intended to measure.

Low Construct Validity

When a test or tool does not accurately measure the theoretical concept it is intended to measure.

Operational Definition

A clear, precise description of how variables in a study will be measured or manipulated, making research findings replicable and understandable.