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27. {10 marks) In a study of how the economic status would affect the choice of health seeking (non-local or local pharmacy) behaviour for treatment of acute respiratory infection (ARI). The frequencies are obtained for the economic status to the data on childhood health seeking behavior for treatment of ARI in the urban area as follows. Urban Local pharmacy Non-local pharmacy Lower econ status 21 Upper econ status 25 (a) What are the explanatory variable and response variable here? (b) We are interested in testing whether there is a relationship between the economic status and the choice of health seeking. Write down the 2 competing hypotheses for statistical testing. (0) Conduct a Chi-square test for the two hypotheses that you stated in part (b). What are your conclusions? Given the rightside 5% critical value of a 1 df Chisquare distribution is 3.84