[Step-by-Step] In a sample 80 workers from a factory in city A, it was found that 5% were unable to read, while in a sample of 50 workers in city B, 8%
Question: In a sample 80 workers from a factory in city A, it was found that 5% were unable to read, while in a sample of 50 workers in city B, 8% were unable to read. Can it be concluded that there is a difference in the proportions of nonreaders in the two cities? Use a = 0.10. Find the 90% confidence interval for the difference of the two proportions.
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