Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation that displays the relationship between two quantitative variables, using dots to represent individual data points.

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

How can you determine the line of best fit in a scatterplot?

Back

The line of best fit is determined by plotting a line that best represents the trend of the data points, minimizing the distance between the line and all points.

Front

What is the purpose of using a line of best fit?

Back

The line of best fit helps to predict values and understand the relationship between the variables in a scatterplot.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations; they can affect the correlation and the line of best fit.

Front

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

Back

The slope indicates the rate of change between the two variables; a steeper slope suggests a stronger relationship.

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 the range of correlation coefficients?

Back

The range of correlation coefficients is from -1 to 1, where -1 indicates a perfect negative correlation, 0 indicates no correlation, and 1 indicates a perfect positive correlation.