Time Series Analysis Problems

Last updated 9/3/2019. Move the "seed" slider to select a new problem. Check the check boxes to see the answers to each part.
There will be a problem similar to this on Test 1. The data for these problems comes from #25, #26, #27, #28 pages 76-77 of Navidi & Monk, "Elementary Statistics", 2nd edition, McGraw-Hill Education 2016. Updated 2/2/2019 and 9/3/2019.