ECTION B (50 marks) nswer ALL questions in this section. QESTION BI [25 marks! ) A manufacturing company has claimed that 90% of items produced by a certain process are non-defective. An improvement in the process is being considered that they feel will increase the proportion of non-defective items. In an experiment, 100 items are produced with the new process and ve are found to be defective. Test the claim that the process has been improved at 0.10 level of signicance. (10 marks) ) A manager found errors in pages when he examined the quality of a printed book. As such he is interested in examining the relationship between the number of printing errors and the type size used. He selects three different books recently printed by his company, each using a different type size. From each book he records the number of pages with printing errors and the number of error-free pages. The results are shown in Table 3 below. Table 3. Printing errors in each type. Type Size A B C Pages with Errors 23 17 41 Pages without Errors 241 183 210 Determine whether the data indicate at 0.05 level of signicance a dependence between type size and printing errors. (15 marks)