Scatterplots intro

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does a positive correlation indicate in a scatterplot?

Back

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

Front

What does a negative correlation indicate in a scatterplot?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What does no correlation mean in a scatterplot?

Back

No correlation means there is no discernible relationship between the two variables; changes in one do not affect the other.

Front

How can outliers affect the interpretation of a scatterplot?

Back

Outliers can skew the perception of the relationship between variables, potentially leading to incorrect conclusions.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two quantitative variables, helping to identify trends, correlations, and outliers.

Front

What is the difference between linear and non-linear associations in scatterplots?

Back

A linear association shows a straight-line relationship between variables, while a non-linear association shows a curved relationship.

Front

How do you identify an outlier in a scatterplot?

Back

An outlier is identified as a point that lies significantly outside the overall pattern of the data, often distant from other points.

Front

What is the significance of the slope in a scatterplot?

Back

The slope indicates the direction and strength of the relationship between the two variables; a steeper slope indicates a stronger relationship.

Front

What does the term 'regression line' refer to in the context of scatterplots?

Back

A regression line is a straight line that best fits the data points in a scatterplot, used to predict values of one variable based on another.