Correlation Coefficient Practice

A study compared the number of years of education and a person's annual salary. The correlation coefficient of the data was r = 0.913. Which conclusion can be made using the correlation coefficient?

• There is a strong positive correlation.

• There is a strong negative correlation.

• There is no correlation.

• There is a weak positive correlation.

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CCSS.HSS.ID.C.8

The relationship ship between a woman's show size and length of her foot, in inches, is given in the table.

Calculate the line of best fit using the graphing calculator.

• a = .25 and b = 7.75

• y = .25x + 7.75

• r = 1

• y = ax + b

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CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

CCSS.HSS.ID.C.8

As shown in the table, a person's target heart rate during exercise changes as the person gets older. Use the graphing calculator to find the correlation coefficient (r).

• -0.999

• -0.664

• 0.998

• 1.503

Tags

CCSS.HSS.ID.C.8

What is the correlation coefficient of the data characteristics shown?

• -.928

• .928

• .861

• -.861

Tags

CCSS.HSS.ID.C.8

What COULD be the approximate value of the correlation coefficient for the scatter plot?

• -.851

• -.162

• 0.211

• 0.905

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

The points in the scatter plot show the ages of cars (x) and their price in dollars (y). What could you conclude about the relationship of the data?

• Age and price have no correlation.

• Age and price have a weak positive relationship.

• Age and price have a weak negative relationship.

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

CCSS.HSS.ID.C.9

Which value of r represents data with a strong negative correlation between two data sets?

• -1.07

• -0.89

• -0.14

• 0.92

Tags

CCSS.HSS.ID.C.8

Which value of r represents data with a strong positive correlation between two data sets?

• 0.89

• 0.34

• 1.04

• 0.01

Tags

CCSS.HSS.ID.C.8

The relationship between x, a student's test scores and y, the student's success in school. Based on this information, what could the relationship between the data?

• As the test scores increase, the student's success increases.

• As the test scores increase, the student's success decreases.

• There is no relationship between test scores and student success.

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

CCSS.HSS.ID.C.8

Which calculator output shows the strongest relationship between x and y?

• 
• 
• 
• 

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CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8