When We Test Differences Between the Mean Scores of Two

question 12

Multiple Choice

When we test differences between the mean scores of two unconnected groups,which statistical techniques should we select?

• A)regression
• B)analysis of variance
• C)independent-samples t-test
• D)dependent-samples t-test

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Definitions:

Subject Bias

A form of bias introduced into scientific or experimental research by participants' expectations, treatment, or response to the knowledge that they are being observed.

Sampling Effect

A statistical effect in which the observed variability is not representative of the underlying population due to the sample size or method of selection.

Placebo Effect

A phenomenon where individuals experience a perceived improvement in condition solely because they believe they are receiving treatment, despite no active therapeutic element being present.

Placebos

Inert substances or treatments used in controlled experiments to test the effectiveness of medical drugs by comparison.