Regression diagnostics | Statistical tests
In statistics, the White test is a statistical test that establishes whether the variance of the errors in a regression model is constant: that is for homoskedasticity. This test, and an estimator for heteroscedasticity-consistent standard errors, were proposed by Halbert White in 1980. These methods have become extremely widely used, making this paper one of the most cited articles in economics. In cases where the White test statistic is statistically significant, heteroskedasticity may not necessarily be the cause; instead the problem could be a specification error. In other words, the White test can be a test of heteroskedasticity or specification error or both. If no cross product terms are introduced in the White test procedure, then this is a test of pure heteroskedasticity.If cross products are introduced in the model, then it is a test of both heteroskedasticity and specification bias. (Wikipedia).
Can You Believe It? #10 What Is White Light?
Visit http://ilectureonline.com for more math and science lectures! To donate: http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 I will demonstrate where does white light come from and “What is White Light?” Previous video in this series can be seen at: https:/
From playlist CAN YOU BELIEVE IT?
Jonathan defines what white noise actually is and how it's used to mask other annoying sounds. Learn more at HowStuffWorks.com: http://science.howstuffworks.com/question47.htm Share on Facebook: http://goo.gl/n7YNrZ Share on Twitter: http://goo.gl/Fq9InS Subscribe: http://goo.gl/ZYI7Gt V
From playlist Episodes hosted by Jonathan
What is a hypothesis test? The meaning of the null and alternate hypothesis, with examples. Overview of test statistics and confidence levels.
From playlist Hypothesis Tests and Critical Values
AWESOME Physics demonstration "Young' s experiment with white light"!!!
Physics (la physique)(science experiments)!
From playlist physics
#26. What type of tailed test should be performed?
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys #26. What type of tailed test should be performed?
From playlist Statistics Final Exam
Time Series Talk : White Noise
Intro to white noise in time series analysis
From playlist Time Series Analysis
Spectralon—The World's Whitest White Reflects Over 99% of Visible Light vs Black 3.0!
Get your Action Lab Box Now! https://www.theactionlab.com/ In this video I show you the whitest material on earth called Spectralon. Spectralon reflects over 99% of visible light and holds the record for the world's whitest material. I show you what it looks like to shine a burning laser
From playlist The Blackest Black And Whitest White
How to detect White Noise in time series with R | Test Simulate Plot Data Tutorial Data Analyisis
What is white noise? How to detect if my time series is just noise? - How to determine if my data is white noise - How to simulate white noise in R / Rstudio - Mathematical equation for errors - What are the properties or conditions of white noise - Which test to use ? libraries? - what
From playlist machine learning
Python for Data Analysis: ANOVA
This video covers the basics of how to perform ANOVA tests in Python. Subscribe: ► https://www.youtube.com/c/DataDaft?sub_confirmation=1 This is lesson 26 of a 30-part introduction to the Python programming language for data analysis and predictive modeling. Link to the code notebook bel
From playlist Python for Data Analysis
Guy Nason: A test for local white noise (and the absence of aliasing) in locally stationary...
Abstract: This talk develops a new test for local white noise which also doubles as a test for the lack of aliasing in a locally stationary wavelet process. We compare and contrast our new test with the aliasing test for stationary time series due to Hinich and co-authors. We show that the
From playlist Probability and Statistics
Random Walk and Time Series Tutorial in R: ACF Dickey Fuller Test Ljung Box stationarity correlation
what is a random walk in time series? How to determinte if my data is a random walk? how to test stationarity? In this episode of the crash course - tutorial on statistics and data science with R / Rstudio: - Characteristics of a random walk - How to test my time series behaviour in R?
From playlist machine learning
Positive and Negative Ion Tests - GCSE Chemistry Revision - SCIENCE WITH HAZEL
In this GCSE Chemistry revision video, Hazel describes how to test for positive and negative ions, including flame tests and precipitate reactions. Sorry about the messy hair! These videos are designed to help with your GCSE science revision. For additional support Like Hazel's Facebook
From playlist GCSE & IGCSE Chemistry Revision //
HSC Chemistry Applying Chemical Ideas Testing for Cations
From playlist Y12 Chem Mod 8 Applying Chemical Ideas
Edexcel IGCSE Chemistry lesson on chemical tests
From playlist Edexcel IGCSE Chemistry
DEFCON 15: The Next Wireless Frontier - TV White Spaces
Speaker: Doug Mohney Editor, VON Magazine More unlicensed bandwidth from TV!?! A long-term push to free up more wireless spectrum is expected to come to fruition this year as the FCC will open up unused TV channels - dubbed "white spaces" - for unlicensed broadband use this fall, with ful
From playlist DEFCON 15
Overview of the F-Test. What it is and how it works with general steps and assumptions.
From playlist F Test
MountainWest RubyConf 2008 - BDD with Shoulda by: Tammer Saleh
BDD with Shoulda by: Tammer Saleh
From playlist MountainWest RubyConf 2008