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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

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 five are found to be defective. Test the claim that the process has been improved at 0.10 level of significance

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