The Regression Equation = 3,698 + 2,538X Gives an R²

question 21

Multiple Choice

The regression equation = 3,698 + 2,538X gives an R² value of 0.2645.This means that ________.

• A)X and Y have a very high level of correlation
• B)the percentage of variation in Y that is attributed to random factors is 26.45%
• C)26.45% of the variation in Y can be explained by X
• D)a one-percent change in Y will lead to a 26.45% change in X

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Definitions:

Membrane Receptor

A specialized protein molecule embedded in the cell membrane that can interact with specific molecules, starting a chain of cell responses.

Depolarization

The process in which a cell's membrane potential becomes less negative, moving towards zero, which is critical in the initiation of action potentials.

Threshold Stimulus

Stimulus resulting in a local potential just large enough to reach threshold and produce an action potential.

All-Or-None Contraction

A principle stating that a nerve or muscle fiber responds completely or not at all to a stimulus once the stimulus reaches a threshold value.