Module 5 Correlation Practice

If a model has a correlation coefficient that is r = -0.998, then you know ______________________.

• the model has a strong, positive correlation.

• the model has a weak, negative correlation.

• the model has no correlation.

• the model has a strong, negative correlation.

The famous scientist, Deebo Einstein discovers that the number of elbows in chickens correlates with their beauty. The correlation coefficient (r)=-0.43. Which would best describe this correlation?

• weak, decreasing

• strong, increasing

• strong, decreasing

• weak, increasing

The famous scientist, Adam Pascal discovers that the number of toes in popstars correlates with their bravado. The correlation coefficient (r)=0.41. Which would best describe this correlation?

• weak, increasing

• strong, increasing

• strong, decreasing

• weak, decreasing

The famous anthropologist, KK Pascal discovers that the number of knees in popstars correlates with their IG followers. The correlation coefficient (r)=-0.92. Which would best describe this correlation?

• strong, decreasing

• strong, increasing

• weak, increasing

• weak, decreasing

The data in the table show the number of trees in a forest (x) and the tons of oxygen produced (y). Using the data set, a linear regression model was taken y = 0.13x - 0.19. What is the observed value when x = 505?

Mathematical Equivalence

ON

The data in the table show the number of trees in a forest (x) and the tons of oxygen produced (y). Using the data set, a linear regression model was taken y = 0.13x - 0.19. What is the predicted value when x = 175?

Mathematical Equivalence

OFF

Which correlation coefficient shows the strongest relationship between the independent and dependent variable?

• -.85

• .9

• 0

• -.77

Which correlation coefficient shows the strongest relationship between the independent and dependent variable?

• -.99

• .98

• .1234

• .12345

Students who miss more class get ______ exam scores.

• lower

• higher

• stronger

• weaker

As weight increases, height ________.

• increases

• decreases

• shrinks

• doubles