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  3. i need the solution with explanation please...

Question: i need the solution with explanation please...

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3. The purpose of a study by Tam et al was to investigate the wheelchair maneuvering in individuals with lower-level spinal cord injury (SCI) and healthy controls. Subjects used a modified wheelchair to incorporate a rigid seat surface to facilitate the specified experimental measurements. Interface pressure measurement was recorded by using a high-resolution pressure-sensitive mat with a spatial resolution of 4 sensors per square centimeter taped on the rigid seat support. During static sitting conditions, average pressures were recorded under the ischial tuberosities. The data for measurements of the left ischial tuberosity (in mm Hg) for the SCI and control groups are shown below Control13 115 124 131 122 11 SCI 60 150 130 180 163 13 Source: Eric W. Tam, Arthur F. Mak, Wai Nga Lam, John H. Evans. and York Y. Chow, Pelvic Movement and Interface Pressure Distribution During Manual Wheelchair Propulsion, Archives of Physical Medicine and Rehabilitation, 84 (2003), 1466-72

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