Adobe Acrobat Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. Ittrandomly surveys 200 people. The sample mean is 23.2 hours. There is a...

Extracted text: Adobe Acrobat Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. Ittrandomly surveys 200 people. The sample mean is 23.2 hours. There is a known population standard deviation of 6.2 hours. The population distribution is assumed to be normal. Construct a 90% confidence interval for the population mean time to complete the tax forms. a. Calculate the error bound. (Round your answer to two decimal places.)