Question

Each of 200 subjects were shown a proposed commercial and asked to identify the marketed product 5 minutes after the viewing. A​ 95% confidence interval was​ calculated, but the client indicated that the resultant margin of error is too large and must be​ one-fourth its current size. How large does the new sample need to​ be?

Answer 1

Step-by-step explanation:

first off we need to know the original sample size and if it is in there then im just cant see it