Scatterplot Linear Regression

Find the Pearson Product Moment Correlation Coefficient

What kind of correlation?

• Positive

• Negative

• No

Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong.

• 0.07 weak

• -0.26 weak

• -0.26 moderate

• 0.07 strong

Which graph represents data that has a correlation coefficient close to -1?

• 
• 
• 
• 

Find the Pearson Product Correlation Coefficient

Round to 4 significant digits

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade.

• No relationship exists between the number of books students read and their English grades.

Which with is the line of best fit?

• Black

• Orange

• Red

• Blue

Describe the correlation in the graph shown.

• Strong Negative

• Strong Positive

• Weak Negative

• Weak Positive

The correlation coefficient measures...

• whether there is a relationship between two variables.

• the strength of the relationship between two quantitative variables.

• whether a cause and effect relation exists between two variables.

• the strength of the linear relationship between two quantitative variables.

Which scatter plot shows no relationship?

• Graph A

• Graph B

• Graph C

• Graph D