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Probability based on normal distribution.

Spots and Achilles Tendon injuries Some sports, such as basketball and tennis, put participants at risk for Archilles tendinopathy (AT), an inflammation and thickening of the Achilles tendon. A study in the American Journal of Sports Medicines looked at the diameter in mm of the affected and non affected tendons for patients who participated in these types of sports activities. Presume that the Achilles tendon diameters in the general population have a mean of 5.97 millimeters (mm) with a standard deviation of 1.95 mm.

a. What is the possibility that a randomly selected sample of 31 patients would produce an average diameter of 6.6 mm or less for the non affected tendon?

b. When the diameters of the affected tendon were measured for a sample of 31 patients, the average diameter was 9.80. If the average tendon diameter in the population of patients with AT is no different than the average diameter of the non-affected tendons (5.97mm) what is the probability of observing an average diameter of 9.80 or higher?

c. What conclusions may you draw from the results in part B?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M919881

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