The survival function is a function that gives the probability that a patient, device, or other object of interest will survive past a certain time. The...
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Survival analysis is used in several ways: To describe the survival times of members of a group Life tables Kaplan–Meier curves Survival function Hazard...
50 KB (6,977 words) - 11:12, 17 July 2025
Kaplan–Meier estimator (redirect from Kaplan-Meier survival curve)
limit estimator, is a non-parametric statistic used to estimate the survival function from lifetime data. In medical research, it is often used to measure...
27 KB (4,445 words) - 12:14, 1 July 2025
an empirical distribution function (a.k.a. an empirical cumulative distribution function, eCDF) is the distribution function associated with the empirical...
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{\Pr(X>t+s)}{\Pr(X>s)}}=\Pr(X>t).} Rearranging the equality with the survival function, S ( t ) = Pr ( X > t ) {\displaystyle S(t)=\Pr(X>t)} , gives S (...
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{P} (T>t)=1-F_{T}(t).} In survival analysis, F ¯ X ( x ) {\displaystyle {\bar {F}}_{X}(x)} is called the survival function and denoted S ( x ) {\displaystyle...
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Accelerated failure time model (category Survival analysis)
censored observations one needs the survival function, which is the complement of the cumulative distribution function, i.e. one needs to be able to evaluate...
11 KB (1,473 words) - 03:37, 27 January 2025
product of other distributions. If a density is log-concave, so is its survival function. If a density is log-concave, it has a monotone hazard rate (MHR)...
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Cross-correlation (redirect from Cross-correlation function)
processing, cross-correlation is a measure of similarity of two series as a function of the displacement of one relative to the other. This is also known as...
26 KB (4,083 words) - 05:53, 30 April 2025
Power law (section Power-law functions)
(mass) function directly, these methods introduce an implicit bias in the representation of the data, and thus should be avoided. The survival function, on...
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optimization and decision theory, a loss function or cost function (sometimes also called an error function) is a function that maps an event or values of one...
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}f(u)\,du} is the complementary cumulative distribution function (also called survival function). The concept is named after John P. Mills. The Mills ratio...
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Regression analysis (redirect from Regression function)
regression models propose that Y i {\displaystyle Y_{i}} is a function (regression function) of X i {\displaystyle X_{i}} and β {\displaystyle \beta } ...
37 KB (5,235 words) - 18:48, 4 August 2025
f(t)} is the probability density function and S ( t ) = 1 − F ( t ) {\displaystyle S(t)=1-F(t)} is the survival function, with F ( t ) {\displaystyle F(t)}...
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A likelihood function (often simply called the likelihood) measures how well a statistical model explains observed data by calculating the probability...
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the survival function for Weibull distribution. For α = 1, it is same as the exponential distribution. Another famous example is when the survival model...
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Generalized linear model (redirect from Link function)
response variable via a link function and by allowing the magnitude of the variance of each measurement to be a function of its predicted value. Generalized...
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Outlier Statistical graphics Histogram Frequency distribution Quantile Survival function Failure rate Scatter plot Bar chart Design of experiments Optimal...
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}\operatorname {coth} (t^{\beta }))}{\beta }}} The Hypertabastic survival function is defined as S ( t ) = sech [ α ( 1 − t β coth ( t β ) ) β ]...
36 KB (5,676 words) - 04:26, 12 July 2025
Autocorrelation (redirect from Autocorrelation function)
Pearson correlation between values of the process at different times, as a function of the two times or of the time lag. Let { X t } {\displaystyle \left\{X_{t}\right\}}...
40 KB (5,833 words) - 00:42, 20 June 2025
the relationship between two variables can be described by a monotonic function. The Kendall tau rank correlation coefficient is a measure of the portion...
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calculated by integrating the probability density function (which yields the cumulative distribution function—any other means of calculating the CDF will also...
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Lindy effect (category Survival analysis)
by Iddo Eliazar) is a positive constant. This is equivalent to the survival function of T being Φ ( t ) := Pr ( T > t ) = ( c t ) ϵ , where ϵ = 1 + 1...
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Kolmogorov–Smirnov test (section Setting confidence limits for the shape of a distribution function)
distribution function of the sample and the cumulative distribution function of the reference distribution, or between the empirical distribution functions of two...
31 KB (3,909 words) - 09:43, 9 May 2025
Log-Cauchy distribution (section Survival function)
F(x;0,1)={\frac {1}{2}}+{\frac {1}{\pi }}\arctan(\ln x),\ \ x>0} The survival function when μ = 0 {\displaystyle \mu =0} and σ = 1 {\displaystyle \sigma...
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Survival or survivorship, the act of surviving, is the propensity of something to continue existing, particularly when this is done despite conditions...
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for which Mandelbrot used the term "Lévy flight" is defined by the survival function of the distribution of step-sizes, U, being Pr ( U > u ) = { 1 : ...
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wilderness to avoid dehydration and to keep the body functioning properly. The U.S. Army survival manual does not recommend drinking water only when thirsty...
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{\displaystyle X} and Y {\displaystyle Y} have the following joint probability mass function, in which the six central cells give the discrete joint probabilities f...
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Proportional hazards model (redirect from Cox survival model)
accelerated (or decelerated). Survival models can be viewed as consisting of two parts: the underlying baseline hazard function, often denoted λ 0 ( t ) {\displaystyle...
35 KB (5,760 words) - 13:31, 2 January 2025