A Researcher Is Testing a Hypothesis of a Single Mean $\alpha$

question 64

Multiple Choice

A researcher is testing a hypothesis of a single mean.The critical z value for $\alpha$ = .05 and a two-tailed test is +1.96.The observed z value from sample data is 2.85.The decision made by the researcher based on this information is to ___ the null hypothesis.

• A)reject
• B)not reject
• C)redefine
• D)change the alternate hypothesis into
• E)restate the null hypothesis

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Definitions:

Graded Potentials

Changes in membrane potential that vary in size and are not part of the all-or-nothing response of action potentials.

Transcranial Magnetic Stimulation

A non-invasive procedure that uses magnetic fields to stimulate nerve cells in the brain, often used in treating depression.

EEG

A technique used to measure the electrical activity of the brain via electrodes placed on the scalp, useful in diagnosing conditions and studying brain function.

Single-Cell Recording

A neuroscientific method for measuring the electrical activity of a single neuron, enabling the study of its operational characteristics.