According to a survey from Statistics Canada (Table 2020107, “Earnings of Individuals, by Selected Characteristics and North American Industry Classification System (NAICS), 2011 Constant Dollars”), in 2011, the average earnings in manufacturing in Alberta were $66,700 and in Ontario were $53,700.

a) What additional information do we need in order to calculate the standard error of the estimate for Ontario?

b) What additional information do we need in order to calculate the standard deviation of the estimate for Alberta?