Customer relations bureau located in a large eastern

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A customer relations bureau located in a large eastern city claimed that 80% of the complaints registered with it were settled to the satisfaction of the customers. The local newspaper, doubting whether the percentage was really that large, takes a random sample of 40 complainants and asks them whether they had received satisfaction. Only 12 indicate that they had. Use the normal approximation to make a test of significance at a = 0.01.

Reference no: EM131939290

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