Mathematics, 21.05.2020 00:17 leo4687
He Internal Revenue Service (IRS) provides a toll-free helpline for taxpayers to call in and get answers to questions as they prepare their tax returns. In recent years, the IRS has been inundated with taxpayer calls and has redesigned its phone service as well as posted answers to frequently asked questions on its website (The Cincinnati Enquirer, January 7, 2010). According to a report by a taxpayer advocate, callers using the new system can expect to wait on hold for an unreasonably long time of 12 minutes before being able to talk to an IRS employee. Suppose you select a sample of 50 callers after the new phone service has been implemented; the sample results show a mean waiting time of 10 minutes before an IRS employee comes on the line. Based upon data from past years, you decide it is reasonable to assume that the standard deviation of waiting time is 8 minutes. Using your sample results, can you conclude that the actual mean waiting time turned out to be significantly less than the 12-minute claim made by the taxpayer advocate?
Answers: 3
Mathematics, 21.06.2019 16:00
Question: what is the value of x 4x-2= (-7) +5x. it would be greatly appreciated if someone could actually explain to me step by step
Answers: 2
Mathematics, 21.06.2019 17:00
Somone me i want to know what 18 hours out of 24 hours in a fraction
Answers: 1
Mathematics, 21.06.2019 17:30
If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?
Answers: 2
He Internal Revenue Service (IRS) provides a toll-free helpline for taxpayers to call in and get ans...
Mathematics, 14.10.2019 04:10
History, 14.10.2019 04:10
Spanish, 14.10.2019 04:10
History, 14.10.2019 04:10
English, 14.10.2019 04:10
Mathematics, 14.10.2019 04:10
Mathematics, 14.10.2019 04:10