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(a) A random survey of 100 mobile telephone customers indicated that 96 of them had not experienced any difficulties in making mobile calls in the previous 3 months.
(i) Derive a point estimate for customer satisfaction levels with the service
(ii) Construct a 95% Confidence Interval for the customer satisfaction level
(iii) In its submission to the Com-Reg regulator the phone company claims that 99% of its customers are satisfied with their service level. Use the results from (ii) above to comment on the company’s claim.

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