Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables where each point represents an observation. It helps to visualize the relationship between the variables.

Front

What does a positive correlation in a scatterplot indicate?

Back

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

Front

What does a negative correlation in a scatterplot indicate?

Back

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

Front

What does it mean if a scatterplot shows no correlation?

Back

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

Front

What is the line of best fit in a scatterplot?

Back

The line of best fit is a straight line that best represents the data points in a scatterplot, showing the general direction of the relationship between the variables.

Front

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

Back

The strength of a correlation can be determined by how closely the data points cluster around the line of best fit; tighter clustering indicates a stronger correlation.

Front

What is the purpose of using a scatterplot in data analysis?

Back

Scatterplots are used to identify relationships, trends, and patterns between two quantitative variables.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that fall far from the trend of the rest of the data; they can significantly affect the correlation and the line of best fit.

Front

What does it mean to interpret a scatterplot?

Back

Interpreting a scatterplot involves analyzing the relationship between the variables, identifying trends, correlations, and any anomalies in the data.

Front

What is the difference between correlation and causation?

Back

Correlation indicates a relationship between two variables, while causation implies that one variable directly affects the other.