Correlation and Regression

Front

What is the correlation coefficient?

Back

A statistical measure that describes the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What does a correlation coefficient of 0 indicate?

Back

No correlation between the two variables.

Front

What does a positive correlation mean?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation mean?

Back

As one variable increases, the other variable decreases.

Front

What is a scatterplot?

Back

A graphical representation of the relationship between two quantitative variables, using dots to represent data points.

Front

What is the line of best fit?

Back

A straight line that best represents the data on a scatterplot, showing the trend of the data.

Front

What does a strong positive correlation look like on a scatterplot?

Back

Data points that are closely clustered around a line that slopes upwards.

Front

What does a strong negative correlation look like on a scatterplot?

Back

Data points that are closely clustered around a line that slopes downwards.

Front

What is the y-intercept in a linear equation?

Back

The value of y when x is 0, representing the starting point of the line on the y-axis.

Front

How do you interpret the slope of a regression line?

Back

The slope indicates the change in the dependent variable for each one-unit change in the independent variable.