The patient recovery time from a particular surgical procedure is normally distr

Question

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 7.8 days and a standard deviation of 1.2 days. What is the z-score for a patient who takes 10 days to recover () z = The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.9 days and a standard deviation of 1.7 days. What is the probability of spending more than 3 days in recovery? (Round your answer to four decimal places.) The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.8 days and a standard deviation of 2.1 days. What is the 75th percentile for recovery times? () days

Explanation / Answer

Answer 1: z value is (10-7.8)/1.2=2.2/1.2=1.83

Answer 2: z value is (3-5.9)/1.7=-1.71. From the normal distribution table we get 1-0.9564 or 0.0436

Answer 3: z value for 0.75 probability is 0.68 ( from normal table)

5.8+0.68*2.1=7.228 is the answer

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