A Researcher Was Interested in the Effect of Anxiety on Intelligence

question 54

Multiple Choice

A researcher was interested in the effect of anxiety on intelligence measurement. A group of 100 individuals were placed in an anxiety-provoking situation before being given an IQ test. The scores for this group were then compared to the IQ population mean of 100. The appropriate statistical test to analyze the data in this study is ______.

• A) a one-sample t test
• B) an independent samples t test
• C) a paired/related samples t test
• D) an ANOVA

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Definitions:

Null Hypothesis

A default hypothesis that there is no significant difference or relationship between specified populations, or variables.

P-value

The chance of witnessing outcomes in a test that are as or more extreme than what was actually seen, assuming that the null hypothesis is true.

Significance Level

A threshold set by researchers in hypothesis testing that determines the probability of rejecting a true null hypothesis, often denoted by alpha (α).

Rejection Region

The region in the sampling distribution of a statistic that leads to the rejection of the null hypothesis.