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2.) A telephone company claims that 20% of its customers have at least two telephone lines....

2.) A telephone company claims that 20% of its customers have at least two telephone lines. The company selects a random sample of 500 customers and finds that 88 have two or more telephone lines. At a α = 0.05 significance level, can you conclude that the proportion of customers having at least two telephone lines isn’t 20%?

Math   Statistics-And-Probability   
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