Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables where each point represents an observation in the dataset, showing the relationship between the variables.

Front

What does a strong negative correlation indicate in a scatterplot?

Back

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

Front

What is a line of best fit in a scatterplot?

Back

A line of best fit is a straight line that best represents the data points in a scatterplot, indicating the overall trend of the data.

Front

How can you identify a negative correlation in a scatterplot?

Back

A negative correlation is identified when the points in the scatterplot slope downwards from left to right.

Front

What does it mean if a scatterplot shows no relationship?

Back

If a scatterplot shows no relationship, it means there is no discernible pattern or correlation between the two variables being plotted.

Front

What is the purpose of using a scatterplot?

Back

The purpose of using a scatterplot is to visually assess the relationship between two quantitative variables and to identify trends, patterns, or correlations.

Front

How do you interpret the slope of the line of best fit?

Back

The slope of the line of best fit indicates the direction and strength of the relationship between the two variables; a positive slope indicates a positive correlation, while a negative slope indicates a negative correlation.

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 slope of the line of best fit and may indicate anomalies in the data.

Front

How can you predict values using a scatterplot?

Back

You can predict values using a scatterplot by finding the corresponding value on the line of best fit for a given input value.

Front

What does a weak correlation look like in a scatterplot?

Back

A weak correlation in a scatterplot appears as points that are widely scattered with no clear trend or pattern.