Hope researches the impact of one variable on another. She graphs the data from her research and sees that the data forms a shape that is similar to an arch. What conclusion can Hope draw from her graph?

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Because the graph shows a pattern that is an arch shape, Hope can conclude that there is an association between the variables. However, because the relationship is not linear, there is no correlation. The pattern shows that as one variable changes, the other variable changes in the same way. This does not imply that a change in one variable causes the change in the other variable to happen. Hope cannot conclude that there is a causal relationship.

There is an association between the variables.

  • Usually, a graph shows the relationship between two variables. On variable is plotted on the vertical axis while the other variable is plotted on the horizontal axis. The nature of the plot shows us whether there is an association between the variables as well as the type of association between the variables.

  • Looking at the graph, we can conclude that there is an association between the variables.

Association between variables can easily be shown an a graph plot

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