An Assembly Line Is Operating Satisfactorily If Fewer Than 4

Multiple Choice

An assembly line is operating satisfactorily if fewer than 4% of the phones produced per day are defective. To check the quality of a day's production, the company randomly samples 50 phonesfrom a day's production to test for defects. Define the population of interest to the manufacturer.

A) the 4% of the phones that are defective
B) all the phones produced during the day in question
C) the 50 responses: defective or not defective
D) the 50 phones sampled and tested