Correlation Coefficient

Front

What is the correlation coefficient?

Back

A statistical measure that describes the strength and direction of a relationship between two variables.

Tags

CCSS.HSS.ID.B.5

Front

What does a correlation coefficient of 1 indicate?

Back

A perfect positive correlation between two variables.

Tags

CCSS.HSS.ID.B.5

Front

What does a correlation coefficient of -1 indicate?

Back

A perfect negative correlation between two variables.

Tags

CCSS.HSS.ID.B.5

Front

What does a correlation coefficient of 0 indicate?

Back

No correlation between the two variables.

Tags

CCSS.HSS.ID.B.5

Front

What is a line of best fit?

Back

A straight line that best represents the data on a scatter plot.

Tags

CCSS.8.SP.A.2

Front

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

Back

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

Tags

CCSS.HSS.ID.B.5

Front

What does a weak negative correlation look like on a graph?

Back

Data points that are loosely scattered but generally trend downwards.

Tags

CCSS.HSS.ID.B.5

Front

How can you determine the strength of a correlation?

Back

By looking at the correlation coefficient value: closer to 1 or -1 indicates stronger correlation.

Tags

CCSS.HSS.ID.B.5

Front

What is the formula for the line of best fit?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Tags

CCSS.8.EE.B.5

Front

What is the slope in the equation y = -0.18x + 6.47?

Back

-0.18, indicating a slight decrease in y as x increases.

Tags

CCSS.8.EE.B.5