Question

4-73 An article in Knee surgery Sports Traumatol Arthrosc showed a mean time of 120 minutes and standard deviation of 12 minutes for anterior cruciate ligament (ACL) reconstruction surgery at high- volume hospitals. (a) What is the probability that your ACL surgery at a high-volume hospital is completed in less than (b) What is the probability that your ACL surgery at a high-volume hospital requires a time more (c) The probability of a completed ACL surgery at a high-volume hospital is equal to 95% at what 91 minutes? than 1.5 standard deviations above the mean? time? (d) If your surgery requires 190 minutes, what do you conclude about the volume of such surgeries at your hospital? Explain.

Answer 1

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