The following questions refer to the figure below of a 3D CT of the heart. 
-Which line points to the left ventricle?
Definitions:
Random Variable
A variable whose values depend on the outcomes of a random phenomenon.
Sample Proportion
The ratio of members in a sample that have a particular characteristic to the total number of members in that sample, often used in statistics to estimate population proportions.
Confidence Coefficient
A value, typically close to 1, that specifies the likelihood that a confidence interval will contain the true population parameter.
Sampling Distribution
The distribution of a statistic (like a mean or proportion) that would result from taking a large number of samples from a population.
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