EXAMPLE 5.12

Convert the results to the total time. There are 50 time intervals between the 1st and 51st snap. According to the central limit theorem calculations in Example 5.11,

We know that the sample mean is the total time divided by 50, so the event is the same as the event . We can say that the probability is 0.8264 that the total time is 50(13.0) = 650 minutes (10.8 hours) or greater.