All but one of the following statements contains a blunder. Which statement could be correct?
a. There is a correlation of 0.54 between the position a football player plays and his weight.
b. We found a correlation of r= -0.63 between gender and political party preference.
c. The correlation between the gas mileage of a car and its weight is r=0.71 mpg.
d. We found a high correlation (r=1.09) between height and age of children.
e. The correlation between planting rate and yield of tomatoes was found to be r=0.23.
Answer: e. The correlation between planting rate and yield of tomatoes was found to be r=0.23.