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

question 44

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)fail to reject
• C)redefine
• D)change the alternate hypothesis into
• E)restate the null hypothesis

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Definitions:

Existential Import

A property of categorical propositions; a proposition has existential import if its truth depends on the existence of things of the kinds specified by terms in the proposition.

Contrary

Opposing or differing in nature, direction, or meaning; in logic, it refers to propositions that cannot both be true but can both be false.

Proposition

An articulation or statement that communicates a judgement or perspective.

Disproven

Shown to be false or incorrect through evidence or logical argument.