The following questions refer to the figure below of an axial, T2-weighted MRI of the lumbar vertebra. 
-Which line points to the cauda equina?
Definitions:
One-way ANOVA
A statistical test that determines whether there are statistically significant differences between the means of three or more unrelated groups.
Democrats
A member or supporter of the Democratic Party, one of the two major contemporary political parties in the United States.
Variance
A measure of how much values in a data set differ from the mean of the data set.
Null Hypothesis
A statistical hypothesis that assumes no significant difference or relationship exists between certain characteristics or variables.
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