1. A work sampling study is needed that will estimate the percentage of time a postal clerk spends selling stamps as opposed to other duties. The proportion is assumed to be p=15 percent. Determine the necessary sample size to estimate that proportion with a confidence of 99.73% to within e=3 percent of maximum acceptable amount of time error.
2. There can be a great deal of subjectivity in the term "qualified." How could qualifications be adjusted to get the type of people sought? Is this a weakness in the law?