The 2011 census reports that the average number of residents per private household in Canada is 2.5. A sample of 28 households in Swift Current, Saskatchewan, showed the mean number of residents per household was 2.86 residents. The standard deviation of this sample was 1.20 residents. At the 0.05 significance level, is it reasonable to conclude the mean number of residents in Swift Current is more than 2.5 persons?