Which of the following will graphically show whether there is relationship between two variables?

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BlackTom AI · Accepted Answer

Consider the question: which graphical tool shows whether there is a relationship between two variables?
Option 1: Flowchart. Flowcharts depict processes or workflows, not relationships between two quantitative variables, so this is not appropriate for assessing association.
Option 2: Fishbone diagram. Also known as an Ishikawa diagram, it is used for root-cause analysis and identifying contributing factors, not for showing relationships between variables.
Option 3: Scatter diagram. A scatter diagram (scatter plot) graphs pairs of observations, placing one variable on the x-axis and the other on the y-axis, allowing us to visually assess whether a relationship or correlation exists between the variables. This is exactly what is meant by showing the relationship.
Option 4: Spaghetti diagram. This diagram traces the physical flow of materials or people through a process to identify movements and inefficiencies; it does not illustrate the relationship between two variables in a data sense.
Therefore, among the choices, the tool that graphically displays potential relationships between two variables is the scatter diagram, since it directly maps paired data points and enables visual assessment of association, trend, and possible correlation.

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Which of the following will graphically show whether there is relationship between two variables?

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