We Are Investigating the Relationship Among Three Variables

question 116

Multiple Choice

We are investigating the relationship among three variables. We have graphed two of them. Suppose that the variable that is not measured on the x-axis or the y-axis changes. Then, there is

• A) an omitted variable.
• B) a violation of the absence of trend assumption.
• C) a shift in the plotted curve.
• D) a movement along the plotted curve.
• E) no impact on the plotted curve because the variable is not measured on either of the axes.

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Definitions:

Null Hypothesis

The default position that there is no association between two measured phenomena, or no difference among groups being compared.

P-Value

The probability of observing test results at least as extreme as the results actually observed, under the assumption that the null hypothesis is true.

Critical Value

A threshold in hypothesis testing that defines the boundary or cutoff point at which the test statistic is considered significant.

Null Hypothesis

A hypothesis that suggests there is no statistical significance between the two specified populations or sets of data.