For the period from January 1, 1948, to July 31, 2003, a total of m = 62,039 wind speed measurements are available at the reference site, excluding the data from the year 2002. For these measurements,...

For the period from January 1, 1948, to July 31, 2003, a total of m = 62,039 wind speed measurements are available at the reference site, excluding the data from the year 2002. For these measurements, the average wind speed was x* = 7.4285. Give a 95% prediction interval on the long-term average wind speed at the candidate site. This long-term average of the past is then taken as an estimate of the long-term average of the future and can be used to help decide if the candidate is a suitable site for a wind farm.