Estimating Correlation Coefficient

Determine whether the points in each scatter plot have a positive correlation, a negative correlation, or no correlation. Then determine which r-value is most accurate.

• r = 0.097

• r = - 0.57

• r = 0.83

• r = 1

Determine whether the points in each scatter plot have a positive correlation, a negative correlation, or no correlation. Then determine which r-value is most accurate.

• r = - 0.009

• r = 0.8

• r = - 0.9

• r = 0.2

Determine whether the points in each scatter plot have a positive correlation, a negative correlation, or no correlation. Then determine which r-value is most accurate.

• r = 0.9

• r = - 0.6

• r = 0.02

• r = - 0.006

Determine whether the points in each scatter plot have a positive correlation, a negative correlation, or no correlation. Then determine which r-value is most accurate.

• r = 0.01

• r = 0.8

• r = - 0.5

• r = 1

What is the correlation coefficient of the data characteristics shown?

• -.928

• .928

• .861

• -.861

To convince his students to slow down, Coach Logan tracks the typing speed and the number of errors made from a few of his students. Calculate the correlation coefficient, r, of the data set. Round to THREE decimal places.

Mathematical Equivalence

ON

To convince his students to slow down, Coach Logan tracks the typing speed and the number of errors made from a few of his students. Calculate the correlation coefficient, r, of the data set. Round to THREE decimal places.

Mathematical Equivalence

ON

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1

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

• -0.999

• -0.664

• 0.998

• 1.503

• There is a strong positive relationship.

• There is a weak positive relationship.

• There is a strong negative relationship.

• There is no relationship.