... categorical by nature and bar and pie charts are the main graphical presentational tools for such nature of data. Moreover, I used cross-tabulation because I wanted to link the variables and ... quality was good, 40% said it was poor and 13% had no comment about the rating. The rating was also unequally distributed among the satisfied and dissatisfied customers and also among the sample ... the parameter takes a particular value, which is stated as Ho; and the statement that the parameter fails in some alternative, which is stated as Ha. (Agresti & Finlay, 2008, p. 144). The...