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QUESTION
A telephone company estimates that 30% of its customers are interested in high speed Internet service.
A telephone company estimates that 30% of its customers are interested in high speed Internet service. To test this estimate a random sample of 100 customers was selected and the results showed that 25 were interested in the service. Can it be concluded that the percentage of customers interested in high speed internet service is different from 30%. Formulate and test the appropriate hypotheses at 5% significance level. Use the critical value approach.
