Scatter plots and Association

Front

What is a scatter plot?

Back

A scatter plot is a graphical representation of two variables, where each point represents an observation in the dataset, allowing for the visualization of relationships between the variables.

Front

What does a positive correlation indicate in a scatter plot?

Back

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

Front

What does a negative correlation indicate in a scatter plot?

Back

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

Front

What does no correlation mean in the context of a scatter plot?

Back

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

Front

How can you identify a positive association in a scatter plot?

Back

A positive association can be identified by a pattern where points slope upwards from left to right.

Front

How can you identify a negative association in a scatter plot?

Back

A negative association can be identified by a pattern where points slope downwards from left to right.

Front

What is the purpose of using scatter plots in data analysis?

Back

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

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.

Front

What is an outlier in a scatter plot?

Back

An outlier is a data point that lies significantly outside the general pattern of the other points in the scatter plot, which may indicate variability or an error in data.

Front

What does a scatter plot with a tight cluster of points indicate?

Back

A tight cluster of points indicates a strong correlation between the two variables.