What Is the Connection Between a Scatter Plot and a Calculation

question 2

Multiple Choice

What is the connection between a scatter plot and a calculation of correlation?

• A)Constructing a scatter plot allows the researcher to visualize in advance whether a calculation of linear correlation is likely to reveal a relationship between the variables.
• B)Constructing a scatter plot produces a correlation coefficient, as does calculating a correlation.
• C)A calculation of correlation should be performed before constructing a scatter plot, because the calculation is more scientific.
• D)The scatter plot provides a visual representation of the connection between two variables; a correlational calculation provides a quantification of the connection between the same variables.
• E)Just like calculation of correlation, constructing a scatter plot provides a way to quantify explained variance.

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Definitions:

Phylogenetic Systematics

A method of classifying organisms based on their evolutionary history and relationships, using phylogenetic trees.

Cladograms

A diagram used in cladistics which shows relations among organisms.

Molecular Clocks

Methods used to estimate the time of evolutionary events based on the hypothesis that genetic mutations accumulate at a predictable rate over time.

Fishlike Vertebrates

Aquatic animals featuring a backbone, including both true fish and fish-shaped species with similar living habitats and structures.