The authors of the paper Flat Footedness Is Not a Disadvantage for Athletic Performance in Children Aged

The authors of the paper €œFlat Footedness Is Not a Disadvantage for Athletic Performance in Children Aged 11 to 15 Years€(Pediatrics [ 2009]: e386€“ e392) studied the relationship between y = arch height and scores on five different motor ability tests. They reported the following correlation coefficients:

a. Interpret the value of the correlation coefficient between average hopping height and arch height. What does the fact that the correlation coefficient is negative say about the relationship? Do larger arch heights tend to be paired with larger or smaller average hopping heights?
b. The title of the paper suggests that having a small value for arch height (flat footedness) is not a disadvantage when it comes to motor skills. Do the given correlation coefficients support this conclusion? Explain.

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Motor Ability Test Height of counter Correlation between Test score and Arch Height -0.02 movement jump Hopping average height Hopping: average power -0.10 -0.09 Balance, closed eyes 0.04 one leg Toe flexion 0.05