A Manufacturer of Cellular Phones Has Decided That an Assembly

A manufacturer of cellular phones has decided that an assembly line is operating satisfactorily if less than 0.0 5% of the phones produced per day are defective. To check the quality of a day's production, the company decides to randomly sample 30 phones from a day's production to test for defects. Define the population of interest to the manufacturer.

A) the 30 phones sampled and tested
B) the 0.0 5% of the phones that are defective
C) the 30 responses: defective or not defective
D) all the phones produced during the day in question