In recent years, the debate over the Canadian economy has been constant. The electorate seems somewhat divided as to whether the economy is in a recovery or not. Suppose a survey was undertaken to ascertain whether the perception of economic recovery in Nova Scotia differs according to political affiliation. People were selected for the survey from the Liberal party, the Conservative party, and the NDP. A 25-point scale was developed in which respondents gave a score of 25 if they felt the economy was definitely in complete recovery, a 0 if the economy was definitely not in a recovery, and some value in between for more uncertain responses. To control for differences in socio-economic class, a blocking variable was maintained using five different socio-economic categories. The data are given here in the form of a randomized block design. Use α = 0.01 to determine whether there is a significant difference in mean responses according to political affiliation.

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Political Affiliation Socio-Economic Class Liberal Conservative NDP 11 5 8 15 9 8 19 14 15 16 12 10 9 8 7 Upper Upper middle Middle Lower middle Lower