Scatterplots

Front

What is a scatterplot?

Back

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.

Front

What does an outlier represent in a scatterplot?

Back

An outlier is a data point that differs significantly from other observations. It may indicate variability in the measurement or a possible experimental error.

Front

How do you identify an outlier in a scatterplot?

Back

An outlier can be identified as a point that is distant from the cluster of other points in the scatterplot.

Front

What is positive correlation in a scatterplot?

Back

Positive correlation occurs when an increase in one variable tends to be associated with an increase in another variable, resulting in a rising trend in the scatterplot.

Front

What is negative correlation in a scatterplot?

Back

Negative correlation occurs when an increase in one variable tends to be associated with a decrease in another variable, resulting in a falling trend in the scatterplot.

Front

What does no correlation mean in a scatterplot?

Back

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

Front

What is the purpose of using scatterplots?

Back

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

Front

What does a linear relationship in a scatterplot indicate?

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A linear relationship indicates that the data points can be approximated by a straight line, showing a consistent rate of change between the variables.

Front

How can you determine the type of correlation from a scatterplot?

Back

You can determine the type of correlation by observing the direction of the trend: upward for positive correlation, downward for negative correlation, or no clear trend for no correlation.

Front

What is the significance of the axes in a scatterplot?

Back

The x-axis typically represents the independent variable, while the y-axis represents the dependent variable, allowing for analysis of their relationship.