What are the advantages of log returns over simple returns in the context of computing stock market returns? (a) A group of male and female workers is asked to indicate how much they spend eyen week on coffee. The data in Table 3.1 represent random samples drawn from malt and female workers in the United Kingdom. Table 3.1: Male and Female Weekly Expenditure on Coffee Male Coffee Female Coffee Expenditure - Expenditure - E 15.0 14.0 13.0 13.0 10.0 15.0 20.0 16.5 5.0 1?.0 0.0 11.0 10.0 "3.0 10.0 8.0 12.5 14.5 1?.0 8.0 18.0 5.0 4.0 A test for normality is undertaken and the null hypothesis of normality is rejected for both sets of data. Undertake a suitable test, using a 5% significance level, to ascertain whether there are gender differences in weekly expenditure on coffee