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Exercise 1: Companies often need to use Downsizing (laying off employees), in an attempt to reduce costs. The following table shows the number of layoffs in a sample of employees of three different sectors of employment, together with the work experience of the employees that got fired. Sector of employment Work experience A C Less than 6 months 13 30 15 6 months to 5 years 15 11 1 10 More than 5 years 10 4 Test if the sector of employment is generally independent of work experience of employees that are laid off. Use a 5% level of significance. Exercise 2: In a recent survey a sample of 230 consumers were asked regarding their new mobile services offered by their company to examine how satisfied they were. The data were presented in the following table: Gender Satisfaction from new mobile service Male Female High 75 90 Low 30 35 Test if there is generally a relation between gender and level of satisfaction from the new mobile services. Use a 5% level of significance