A researcher is interested in whether the variation in the size of human beings is proportional throughout each part of the human. To partly answer this question they looked at the correlation between the foot length (in millimeters) and height (in centimeters) of 30 randomly selected adult males. The data is provided below. Use Excel to calculate the correlation coefficient r between the two data sets. Round your answer to two decimal places.

Foot length (mm) Height length (cm) 212.5 198.7 241.3 128.7 242.5 118.7 221.6 187.7 244.9 178.7 255.3 157.8 256.9 167.8 231.7 147.8 258.4 138.7