Suppose that an accounting firm does a study to determine the time needed to complete one person'stax forms. It randomly surveys 50 people. The sample mean is 22.7 hours. There is a known standarddeviation of 8 hours. The population distribution is assumed to be normal. Round answers to 3decimal places.a. Find the following:OT005O nb. Construct a 90% confidence interval for the population mean time to complete tax forms.o State the confidence interval.o Calculate the error bound.c. Suppose that the firm decided that it needed to be at least 99% confident of the population meanlength of time to within one hour. How would the number of people the firm surveys change?Select an answer

From the provided information.,Sample mean = 22.7Population standard deviation = 8Sample size = 50

Answered: Suppose that an accounting firm does a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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