Statistics Canada collects census data about Canadians every five years. The department provides data files that contain a representative sample of anonymous individual responses to census surveys. A subset of these data is provided in the file DYS14-30. There is information on Canadians from Alberta and Ontario. Age and wages and salaries are shown for individuals who had non zero wages and salaries in the data set.7 Use an indicator variable for province, and build a regression model for wages and salaries, based on age and province. Is province a significant explanatory variable in this model?