In a Sample of N = 23, the Critical Value

question 26

Multiple Choice

In a sample of n = 23, the critical value of the correlation coefficient for a two-tailed test at α = .05 is:

• A)±.524
• B)±.412
• C)±.500
• D)±.497

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Definitions:

Suppressor T Cell

Subset of T lymphocytes that decreases the activity of B cells and T cells.

Cytokines

Small proteins released by cells, especially immune cells, that have a specific effect on the interactions and communications between cells.

Secondary Response

Immune response that occurs when the immune system is exposed to an antigen against which it has already produced a primary response; also called memory response.

Memory Cell

Small lymphocyte that is derived from a B cell or T cell and that rapidly responds to a subsequent exposure to the same antigen.