True proportion of current business with repeat customer

Reference no: EM131813738

Question: In the past, 68% of a garage's business was with former patrons. The owner of the garage samples 200 repair invoices and finds that for only 114 of them the patron was a repeat customer.

a. Test whether the true proportion of all current business that is with repeat customers is less than 68%, at the 1% level of significance.

b. Compute the observed significance of the test.

Reference no: EM131813738

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