The authors of a paper studied the relationship between y = arch height and scores on a number of different motor ability tests for 218 children. They reported the following correlation coefficients.

Motor Ability Test	Correlation between Test Score and Arch Height
Height of Counter Movement Jump	0.08
Hopping: Average Height	0.10
Hopping: Average Power	0.03
Balance, Closed Eyes, One Leg	0.04
Toe Flexion	0.01

Identify the value of the correlation coefficient between average hopping height and arch height.

r = _____