Scatterplots

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What is a scatterplot?

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A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

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What does a positive correlation in a scatterplot indicate?

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A positive correlation indicates that as one variable increases, the other variable also tends to increase.

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What does a negative correlation in a scatterplot indicate?

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A negative correlation indicates that as one variable increases, the other variable tends to decrease.

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What does no correlation mean in a scatterplot?

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No correlation means there is no apparent relationship between the two variables; changes in one variable do not predict changes in the other.

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How can you identify a positive correlation in a scatterplot?

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A positive correlation can be identified when the points on the scatterplot slope upwards from left to right.

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How can you identify a negative correlation in a scatterplot?

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A negative correlation can be identified when the points on the scatterplot slope downwards from left to right.

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What is the purpose of using scatterplots?

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Scatterplots are used to visualize the relationship between two quantitative variables and to identify patterns or trends.

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What is an example of a positive correlation?

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An example of a positive correlation is the relationship between hours studied and test scores; generally, more study hours lead to higher scores.

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What is an example of a negative correlation?

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An example of a negative correlation is the relationship between the amount of exercise and body weight; typically, more exercise leads to lower body weight.

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What does the term 'outlier' mean in the context of scatterplots?

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An outlier is a data point that differs significantly from other observations in the dataset, potentially indicating an anomaly.