In a perfect universe, we would know everything about the population, such as the mean and standard deviation. In our imperfect world, however, we often estimate population parameters from the samples that we draw from that population. When we estimate, however, we lose one degree of freedom to vary in our sample and we have to use n – 1 in the formula for standard deviation.
Chapters
0:00 A perfect world
1:20 When sigma is known
4:24 I have a bad feeling about this
6:30 These are not the estimates you are looking for
8:40 Back from the dark side
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This video is part of a series for an introductory statistics course. It supports an academic course QBA 237 Basic Business Statistics at Missouri State University, College of Business, Department of Information Technology and Cybersecurity. Posted beginning in Fall semester 2022.
This series was designed, written, produced, recorded, edited, and posted by Dr. Todd Daniel, a Ph.D. statistician and researcher with extensive experience in academic statistical research and statistics instruction. Dr. Daniel directed a research institute for many years before doing private consulting for Research by Design, LLC. He remains active in teaching and research.
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Statistics Instructors: you are free to link to this video and the playlist for your seated or online statistics course or for other educational purposes.
Edited in Camtasia 2022
Visual and audio content from DigitalJuice.com
Music: Digital Juice Royalty Free Music
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