Sale of Spinach That Is Contaminated with E Coli Can

Multiple Choice

Sale of spinach that is contaminated with e coli can cause food poisoning among consumers. A food inspector takes an SRS of 400 bags from all the bags of spinach shipped in one day. The laboratory reports that 19 of these bags had e coli contamination. Unknown to the producer, 1 percent of all bags shipped had e coli.
Based on the sample data, the producer estimates that the proportion of contaminated bags in the population is about:

A) 19 percent
B) 1.9 percent
C) 1 percent
D) 4.8 percent
E) 0.3 percent