Question: In a second study with 500 patients, the time until a migraine after taking the new drug had a mean value of 15 hours and

In a second study with 500 patients, the time until a migraine after taking the new drug had a mean value of 15 hours and a standard deviation of 20 minutes and it was found to follow a Lognormal distribution What is the median time until a migraine in hours? What is the time to get a migraine that is surpassed for 70% of the patients in the study?

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