Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional grid.

Front

How do you interpret a scatterplot?

Back

To interpret a scatterplot, look for patterns, trends, and correlations between the variables. A positive correlation means as one variable increases, the other does too; a negative correlation means as one variable increases, the other decreases.

Front

What does a strong correlation in a scatterplot indicate?

Back

A strong correlation indicates that the data points are closely clustered around a line, suggesting a strong relationship between the two variables.

Front

What does a weak correlation in a scatterplot indicate?

Back

A weak correlation indicates that the data points are more spread out and do not follow a clear trend, suggesting a weak relationship between the two variables.

Front

What is the purpose of a trend line in a scatterplot?

Back

A trend line is used to summarize the relationship between the variables and can help predict values.

Front

What does it mean if a scatterplot shows no correlation?

Back

No correlation means there is no apparent relationship between the two variables; the data points are scattered randomly.

Front

How can you determine the slope of a trend line in a scatterplot?

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The slope of a trend line is determined by the change in the y-values divided by the change in the x-values (rise over run).

Front

What is the difference between positive and negative correlation?

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Positive correlation means that as one variable increases, the other also increases. Negative correlation means that as one variable increases, the other decreases.

Front

What is an outlier in a scatterplot?

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An outlier is a data point that is significantly different from the other points in the scatterplot, which can affect the overall interpretation of the data.

Front

How can scatterplots be used in real-life situations?

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Scatterplots can be used in various fields such as education, health, and business to analyze relationships between variables, such as study time vs. exam scores.