Amanufacturer of cellular phones has decided that an assembly line is operating satisfactorily if less than 0.03% of the phones produced per day are defective. to check the quality of a day's production, the company decides to randomly sample 10 phones from a day's production to test for defects. define the population of interest to the manufacturer.

a) the 0.03% of the phones that are defective

b) the 10 phones sampled and tested

c) the 10 responses: defective or not defective

d) all the phones produced during the day in question