Analyses of publicly available genome data provide clues to the beginnings of the coronavirus epidemic in China. Researchers from the Department of Biosystems Science and Engineering at ETH Zurich in Basel used a statistical ...
Mar 2, 2020
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(Medical Xpress)—Visual perception is far more complex and powerful than our experience suggests. Moreover, in attempting to both understand vision and implement it in a computational device, the fact that a species' senses ...
Research by international development organization Sightsavers, University of Ilorin, and the Kogi State Ministry of Health, in Nigeria has revealed links between vision impairment and poor mental health. The study, published ...
Apr 11, 2022
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The COVID infection fatality ratio is around 1% in high-income countries, but substantially lower in low-income countries with younger populations.
Oct 30, 2020
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Zinc deficiency is prevalent around the world, and among children, these mineral shortfalls can lead to stunting, embryonic malformations and neurobehavioral abnormalities. Over several decades, science has improved understanding ...
Nov 17, 2021
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A study conducted in two rural Massachusetts jails found that people with opioid use disorder who were incarcerated and received a medication approved to treat opioid use disorder, known as buprenorphine, were less likely ...
Jan 18, 2022
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Scientists, policymakers and healthcare workers are eager to discern to what extent COVID-19 may be seasonal. Understanding this aspect of the disease could guide our response to the pandemic.
Dec 16, 2020
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A team of researchers from the U.K., Switzerland, the U.S., and the Congo has found that there is an urgent need to combat a vaccine-derived poliovirus. In their paper published in the journal Science, the group describes ...
Loma Linda University Health researchers say high consumption of ultra-processed foods and, separately, high consumption of red meat may be important mortality indicators. Their recently published study adds to a growing ...
May 19, 2022
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The time a person spends on different smartphone apps is enough to identify them from a larger group in more than one in three cases say researchers, who warn of the implications for security and privacy.
Feb 17, 2022
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A statistical model is a set of mathematical equations which describe the behavior of an object of study in terms of random variables and their associated probability distributions. If the model has only one equation it is called a single-equation model, whereas if it has more than one equation, it is known as a multiple-equation model.
In mathematical terms, a statistical model is frequently thought of as a pair (Y,P) where Y is the set of possible observations and P the set of possible probability distributions on Y. It is assumed that there is a distinct element of P which generates the observed data. Statistical inference enables us to make statements about which element(s) of this set are likely to be the true one.
Three notions are sufficient to describe all statistical models.
One of the most basic models is the simple linear regression model which assumes a relationship between two random variables Y and X. For instance, one may want to linearly explain child mortality in a given country by its GDP. This is a statistical model because the relationship need not to be perfect and the model includes a disturbance term which accounts for other effects on child mortality other than GDP.
As a second example, Bayes theorem in its raw form may be intractable, but assuming a general model H allows it to become
which may be easier. Models can also be compared using measures such as Bayes factors or mean square error.
This text uses material from Wikipedia, licensed under CC BY-SA
