Solution: From past experiences a television manufacturer found that 10 percent or less of its sets needed any type of repair in the first two years of
Question: From past experiences a television manufacturer found that 10 percent or less of its sets needed any type of repair in the first two years of operation, In a sample of 50 sets manufactured two years ago, 9 needed repair. At the .05 significance level, has the percent of sets needing repair increased?
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