Posted by **Alyssa** on Wednesday, February 22, 2012 at 3:10pm.

A manufacturer of cell phones has decided that an assembly line will be considered to be operating satisfactorily if less than 0.02% of the phones produced per day are defective. To check the quality of a day's production, the company decides to randomly sample 40 phones from the day's production to test for defects. Three of the phones in the sample are defective.

a) Identify the population and the sample.

Is the parmaeter in the study known or unknown .. Explain

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