The Following Display from a TI-84 Plus Calculator Presents the Results

question 23

Multiple Choice

The following display from a TI-84 Plus calculator presents the results of a hypothesis test for the difference between two means. The sample sizes are $n _ { 1 } = 9 \text { and } n _ { 2 } = 10$ How many degrees of freedom did the calculator use?

• A) 16.933567
• B) 15.933567
• C) 0.001964
• D) -3.366473

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Definitions:

Cell-Mediated Immunity

A component of the immune system that involves the activation of certain immune cells to defend the body against pathogens.

Immunoglobulin Classes

Categories of immunoglobulins (antibodies) differentiated by their heavy chain types, playing diverse roles in the immune response.

Artificially Induced

A process or state that is caused to happen through artificial means rather than occurring naturally.

Naturally Induced

Refers to processes or conditions triggered by natural factors rather than artificial or human interventions.