In a Study of the Paperwork Required to File for a Product

Multiple Choice

In a study of the paperwork required to file for a product patent, the US Patent Office selected a random sample of 1500 applicants who applied for a patent during the past five years.The study found the average time applicants in the sample took to fill out the required forms was 28.4 hours, with a sample standard deviation of 5.7 hours.Use sample results to build a 95% confidence interval estimate of the average time taken filling application forms for the population of all patent applicants during this five-year period.Show the upper bound for your interval.

A) 31.4
B) 28.69
C) 25.26
D) 22.41
E) 33.52