A random sample of 110 lightning flashes in a certain region resulted in a sample average radar echo duration of .81 sec and a sample standard deviation of .34 sec (“Lightning Strikes to an Airplane in a Thunderstorm,” J. of Aircraft, 1984: 607–611). Calculate a 99% (two-sided) confidence interval for the true average echo duration m, and interpret the resulting interval.

Answer rating: 100% (QA)

here n 110 x 81 and s 034 Critical v... View the full answer