Consider college officials in admissions, registration,
counseling, financial aid, campus ministry, food services and
so on. How much do these people make per year? Suppose
you read in the Enterprise that 45 officials in student
services earn an sample mean of $50,340 per year. Assume
that σ = $16,920 per year. With what confidence can we
assert that the error of this estimate is at most $4149?