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Pushing economy and wheelchair-propulsion technique were examined for eight ­wheelchair racers on a motorized treadmill in a paper by Goosey and Campbell Adapted Physical ­Activity Quarterly

Pushing economy and wheelchair-propulsion technique were examined for eight ­wheelchair racers on a motorized treadmill in a paper by Goosey and Campbell [Adapted Physical ­Activity Quarterly (1998) 15: 36–50]. The eight racers had the following years of ­racing experience:

Racing experience (years): 6, 3, 10, 4, 4, 2, 4, 7

a. Verify that the mean years of experience is 5 years. Does this value appear to adequately represent the center of the data set?

b. Verify that Σt (y –y-bar)2 = Σt(y –5)2 = 46.

c. Calculate the sample variance and standard deviation for the experience data. How would you interpret the value of the standard deviation relative to the sample mean?

May 10 2020 View more View Less

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