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

question 73

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 -2.11.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:

Halo Effect

A type of cognitive bias where the perception of one positive quality in a person or thing leads to the attribution of other positive qualities, often unrelated.

Aggressive Behaviours

Actions intended to harm or intimidate others, expressed physically or verbally.

Artificial Setting

An environment created or controlled by researchers to simulate conditions for experiments, which might not accurately reflect natural conditions.

Independent Variable

The variable in an experiment that is manipulated or changed to observe its effects on a dependent variable.