Pearson's r

This section introduces Pearson's correlation and explains what the typical values represent. It then elaborates on the properties of r, particularly that it is invariant under linear transformation. Finally, it introduces several formulas we can use to compute Pearson's correlation.

Properties of Pearson's r

Questions

Question 1 out of 4.

The correlation between temperature and number of ice cream cones bought is the same whether the temperature is measured in Celsius or Fahrenheit.

  • True
  • False


Question 2 out of 4.

The correlation between two sets of numbers is the same as the correlation between the log of those two sets of numbers.

  • True
  • False


Question 3 out of 4.

Which of the following is not a possible value for Pearson's correlation?

  • -1.5
  • -1
  • 0
  • .99


Question 4 out of 4.

Which is higher, the correlation between height and weight or the correlation between weight and height?

  • weight and height
  • They are about the same.
  • They are exactly the same.
  • height and weight