Two Variable Statistics

Front

What describes how strong and the type of relationship between two data sets?

Back

Correlation

Front

Describe the type of correlation in this scatter plot: If the points trend downwards from left to right.

Back

Negative

Front

The regression line equation for this data is y = 1.4x + 47. What does the y-intercept represent?

Back

Students who studied 0 minutes, earned an average of 47 points.

Front

A positive correlation between two variables means...

Back

that as one variable increases, the other variable also increases.

Front

Which of the following only involves quantitative variables?

Back

years of experience versus amount of money saved.

Front

What is the definition of correlation in statistics?

Back

A statistical measure that describes the extent to which two variables change together.

Front

What does a negative correlation indicate?

Back

As one variable increases, the other variable decreases.

Front

What is a scatter plot?

Back

A graph that displays values for typically two variables for a set of data.

Front

What does the slope of a regression line represent?

Back

The rate of change of the dependent variable for each unit change in the independent variable.

Front

What is the purpose of a regression line?

Back

To predict the value of a dependent variable based on the value of an independent variable.