"Defendants often ask their attorneys what it means that the jury is deliberating for so long. Suppose that deliberation time is normally distributed with a mean of 4 hours and a standard deviation of 1 hour for cases ending in conviction and a mean of 5.5 hours and a standard deviation of 90 minute for acquittal. 86% of cases result in conviction. In a particular case, the jury has been out already for 6 hours. What is the probability of acquittal?"