Learning Check Flashcard - Scatter Plots and LOBF

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 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 is a correlation coefficient?

Back

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

Front

What does a correlation coefficient of -1.0 mean?

Back

A correlation coefficient of -1.0 means there is a perfect negative linear relationship between two variables.

Front

What does a correlation coefficient of 1.0 mean?

Back

A correlation coefficient of 1.0 means there is a perfect positive linear relationship between two variables.

Front

What does a correlation coefficient of 0 mean?

Back

A correlation coefficient of 0 means there is no linear relationship between the two variables.

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 line of best fit?

Back

The line of best fit can be determined using methods such as least squares regression, which minimizes the distance between the data points and the line.

Front

What is the purpose of a scatter plot?

Back

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