Question 15.6

15.6 Extrapolation. Extrapolation, or prediction outside the range of the data, is risky

  1. (a) because the pattern observed in the data may be different outside the range of the data.

  2. (b) because correlation does not necessarily imply causation.

  3. (c) unless the correlation is very close to 1.

  4. (d) unless the square of the correlation is very close to 1.