According to the Better Business Bureau, the average number of complaints a large corporation receives is 250 per year. Gevaert Inc. randomly chose 15 years they had been in business to discover the number of complaints they had received per year. They had a sample mean of 255, and the population standard deviation is known to be 10 complaints. At the .01 level of significance can it be concluded that the mean number of complaints for Gevaert Inc. is less than that of other companies?