Scatter Plots

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive association in a scatter plot indicate?

Back

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

Front

What does a negative association in a scatter plot indicate?

Back

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

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, showing the trend of the data.

Front

How do you determine the slope of a line of best fit?

Back

The slope is determined by the change in the y-values divided by the change in the x-values between two points on the line.

Front

What does no correlation mean in a scatter plot?

Back

No correlation means there is no apparent relationship between the two variables; the data points do not show any trend.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure of the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Front

How can you identify a strong positive correlation in a scatter plot?

Back

A strong positive correlation is identified when the data points closely follow a straight line that slopes upwards.

Front

How can you identify a strong negative correlation in a scatter plot?

Back

A strong negative correlation is identified when the data points closely follow a straight line that slopes downwards.

Front

What is the purpose of using a scatter plot?

Back

The purpose of using a scatter plot is to visually display the relationship between two variables and to identify any trends or patterns.