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Topics referred to by the same term
Variability is how spread out or closely clustered a set of data is. Look up variability in Wiktionary, the free dictionary. Variability may refer to:
Variability
Hypothesis that human males have more variance in certain traits compared to females
The variability hypothesis, also known as the greater male variability hypothesis, is the hypothesis that human males generally display greater variability
Variability_hypothesis
Variation in the time intervals between heartbeats
Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the variation in
Heart_rate_variability
Topics referred to by the same term
Solar variability refers to changes in solar activity, such as: Solar variation, the change in the amount of radiation emitted by the Sun (see Solar radiation)
Solar_variability
Spatial variability occurs when a quantity that is measured at different spatial locations exhibits values that differ across the locations. Spatial variability
Spatial_variability
Statistical property quantifying how much a collection of data is spread out
In statistics, dispersion (also called variability, scatter, or spread) is the extent to which a distribution is stretched or squeezed. Common examples
Statistical_dispersion
Global climate phenomenon
climate change science, ENSO is known as one of the internal climate variability phenomena. Future trends in ENSO due to climate change are uncertain
El_Niño–Southern_Oscillation
Change in the statistical distribution of climate elements for an extended period
Climate variability includes all the variations in the climate that last longer than individual weather events, whereas the term climate change only refers
Climate variability and change
Climate_variability_and_change
Formula for measuring financial risk
(also known as the Sharpe index, the Sharpe measure, and the reward-to-variability ratio) measures the performance of an investment such as a security or
Sharpe_ratio
Difference in DNA among individuals or populations
While many factors can cause genetic variability, some factors can also decrease genetic variability. Species variability refers to the observable differences
Genetic_variation
cardiac beat. Beat-to-beat fluctuations, known as photoplethysmogram variability (PPGV) are found in the signal baseline and amplitude which reflects
Photoplethysmogram variability
Photoplethysmogram_variability
Relative measure of dispersion expressed as the ratio of standard deviation to the mean
{\displaystyle CV={\frac {\sigma }{\mu }}.} It shows the extent of variability in relation to the mean of the population. The coefficient of variation
Coefficient_of_variation
Long-term weather pattern of a region
typically averaged over 30 years. More rigorously, it is the mean and variability of meteorological variables over a time spanning from months to millions
Climate
Quantificational variability effect (QVE) is the intuitive equivalence of certain sentences with quantificational adverbs (Q-adverbs) and sentences without
Quantificational variability effect
Quantificational_variability_effect
Range of possible values for any characteristic of human beings
Human variability, or human variation, is the range of possible values for any characteristic, physical or mental, of human beings. Frequently debated
Human_variability
Closeness of agreement between successive measurements
causes test–retest variability. Such variability can be caused by, for example, intra-individual variability and inter-observer variability. A measurement
Repeatability
Ecological theory
The Spectral Variability Hypothesis (SVH) states that spatial variability in the reflectance of vegetated surfaces relates to plant species richness. It
Spectral variability hypothesis
Spectral_variability_hypothesis
Measure of consensus in ratings given by multiple observers
"the proportion of variance of an observation due to between-subject variability in the true scores". The range of the ICC may be between 0.0 and 1.0
Inter-rater_reliability
Intense physical sensation of sexual release
stroke. There is some research suggesting that greater resting heart rate variability is associated with orgasms through penile-vaginal intercourse without
Orgasm
2021 book by Daniel Kahneman, Olivier Sibony, and Cass Sunstein
decision-making. The authors define noise in human judgment as "undesirable variability in judgments of the same problem" and focus on the statistical properties
Noise: A Flaw in Human Judgment
Noise:_A_Flaw_in_Human_Judgment
The Tropical Atlantic Variability (TAV) is influenced by internal interaction and external effects. TAV can be discussed in different time scales: seasonal
Tropical_Atlantic_Variability
Checking of an electric circuit to see if current flows
In electronics, a continuity test is the checking of an electric circuit to see if current flows (that it is in fact a complete circuit). A continuity
Continuity_test
Genetic diversity in human populations
this variation accounts for a small portion (~15%) of human genome variability. The majority of variation exists within the members of each human population
Human_genetic_variation
Electrical power generation from wind
other generation plants and daily changes in electrical demand, but the variability of intermittent power sources such as wind power is more frequent than
Wind_power
Country in West Africa
and aims to strengthen the capabilities of stakeholders to control the variability of food products and supplies at local and national levels. Lastly, the
Burkina_Faso
Climate scientist (born 1968)
Retrieved September 30, 2026. Holland, Marika M (1997). Climate change and variability in a single column coupled sea ice/ocean mixed layer model (Thesis).
Marika_Holland
QT interval variability (QTV) refers to the physiological phenomenon of beat-to-beat fluctuations in QT interval of electrocardiograms. Increased QTV
QT_interval_variability
Measurement of blood oxygen saturation
is derived manually from monitor pixels. Pleth variability index (PVI) is a measure of the variability of the perfusion index, which occurs during breathing
Pulse_oximetry
Psychological effect that people learn more by spreading studying out in time
holds that variability surrounding context is responsible for the spacing effect, not only semantic variability. To test the encoding variability theory,
Spacing_effect
American atmospheric scientist
interactions between the ocean, land, atmosphere, and sea ice lead to climatic variability at timescales that vary from seasonal to decadal timescales, as well
David_Battisti
Pregnancy monitoring test
FHR variability, or an absence of FHR variability, does not reliably predict fetal acidemia or hypoxia; lack of moderate baseline FHR variability may
Cardiotocography
In cell biology, single-cell variability occurs when individual cells in an otherwise similar population differ in shape, size, position in the cell cycle
Single-cell_variability
Variety and variability of life forms
Biodiversity is the variability of life on Earth. It can be measured on various levels, for example, genetic variability, species diversity, ecosystem
Biodiversity
Graphical representations of the variability of data
Error bars are graphical representations of the variability of data and used on graphs to indicate the error or uncertainty in a reported measurement
Error_bar
Area of scientific research
factors. It has also been hypothesized that there is slightly higher variability in male scores in certain areas compared to female scores, leading to
Sex differences in intelligence
Sex_differences_in_intelligence
Difference between the anatomical structures
An anatomical variation, anatomical variant, or anatomical variability is a presentation of body structure with morphological features different from
Anatomical_variation
Climate cycle that affects the surface temperature of the North Atlantic
Oscillation (AMO), also known as Atlantic Multidecadal Variability (AMV), is the theorized variability of the sea surface temperature (SST) of the North Atlantic
Atlantic multidecadal oscillation
Atlantic_multidecadal_oscillation
Recurring pattern of climate variability
oscillation (PDO) is a robust, recurring pattern of ocean-atmosphere climate variability centered over the mid-latitude Pacific basin. The PDO is detected as
Pacific_decadal_oscillation
Statistical error
In statistics, sampling errors are incurred when the statistical characteristics of a population are estimated from a subset, or sample, of that population
Sampling_error
Design of experiments to collect similar contexts together
These variables are chosen carefully to minimize the effect of their variability on the observed outcomes. There are different ways that blocking can
Blocking_(statistics)
In quality control, multi-vari charts are a visual way of presenting variability through a series of charts. The content and format of the charts has
Multi-vari_chart
Star whose brightness fluctuates, as seen from Earth
founded in 1890. The most common kinds of variability involve changes in brightness, but other types of variability also occur, in particular changes in the
Variable_star
American microbiologist and educator (1906–2001)
reliability of fermentation and proteolytic reactions and was titled "The Variability of Caseolytic and Sucrose-Fermenting Characteristics of Certain Bacteria
Delaphine_Grace_Wyckoff
Tropical atmosphere element of variability
oscillation (MJO) is the largest element of the intraseasonal (30- to 90-day) variability in the tropical atmosphere. It was discovered in 1971 by Roland Madden
Madden–Julian_oscillation
Astronomical observatory in Chile
Nicolaia. In 2009, the telescope was dedicated to the LaSilla–Quest Variability Survey, by Yale's Department of Astronomy, and has since been used for
La_Silla_Observatory
is an oceanographic and meteorological phenomenon affecting climate variability over the Pacific basin and beyond on interdecadal time scales. The term
Interdecadal Pacific oscillation
Interdecadal_Pacific_oscillation
Statistical technique for estimating sampling variability
replication (BRR) is a statistical technique for estimating the sampling variability of a statistic obtained by stratified sampling. Select balanced half-samples
Balanced_repeated_replication
optimisation whereby a system is made less sensitive to the effects of random variability, or noise, that is present in that system's input variables and parameters
Robustification
Learning strategy
and spaced fashions, hence eliminating the spacing effect. Encoding variability and assumes the benefits of spacing appear because spaced presentations
Distributed_practice
Statistical hypothesis test
between-group variability within-group variability . {\displaystyle F={\frac {\text{between-group variability}}{\text{within-group variability}}}.} The "explained
F-test
definitions involve a period of approximately three months, with some variability. Winter is often defined by meteorologists to be the three calendar months
2026–27_North_American_winter
There are no world records in rowing due to the huge variability that weather conditions can have on times. Instead, there are world best times, which
List of world best times in rowing
List_of_world_best_times_in_rowing
Climatic cooling after the Medieval Warm Period (16th–19th centuries)
variations in Earth's orbit and axial tilt (orbital forcing), inherent variability in global climate, and decreases in the human population (such as from
Little_Ice_Age
Rare disease which results in brain inflammation
time, seizures, decreased breathing, and blood pressure and heart rate variability typically occur. In some cases, patients may develop catatonia. About
Anti-NMDA receptor encephalitis
Anti-NMDA_receptor_encephalitis
American anthropologist and archaeologist
dissertation was titled "Dental Analysis of Classic Period Population Variability in the Maya Area". Scherer's first academic appointment was as Assistant
Andrew_Scherer
Pattern of thunderstorms and rainfall
Convergence Zone Variability in the Gulf of California moisture surges None of these factors can perfectly predict the variability. These factors are
North_American_monsoon
Human retrovirus, cause of AIDS
therapies. HIV differs from many viruses in that it has very high genetic variability. This diversity is a result of its fast replication cycle, with the generation
HIV
Interactions that create Earth's climate
carbon and nitrogen cycles. The climate system can change due to internal variability and external forcings. These external forcings can be natural, such as
Climate_system
Medical condition
increased general [body] and [torso] movement and increased variability of strides. The variability can manifest as a combination of differences in the length
Gait_deviations
Long-term annual pattern of a river's discharge
establish a typical annual discharge regime for rivers with high interannual variability in monthly discharge and/or significant changes in the catchment's characteristics
Discharge_regime
NASA mission, launched in 2010 to GSO
magnetic activity in order to understand solar variability and its effects. The Extreme Ultraviolet Variability Experiment (EVE) measures the Sun's extreme
Solar_Dynamics_Observatory
Global climate phenomenon
2020s scientists have predicted more frequent super El Niño events as variability in SSTs has increased since 1960. Super El Niños can cause widespread
Super_El_Niño_events
Tropical atmospheric circulation feature
heaviest rains are located. Shifts in the ITCZ associated with the seasonal variability of the Hadley circulation cause monsoons. The sinking branches of the
Hadley_cell
Workability and cooperation in producing a measurable output
parts of process capability are: Measure the variability of the output of a process, and Compare that variability with a proposed specification or product
Process_capability
Flow of water from the Indian Ocean to the Atlantic
J. R. E. (November 2008). "Agulhas leakage dynamics affects decadal variability in Atlantic overturning circulation". Nature. 456 (7221): 489–492. Bibcode:2008Natur
Agulhas_Leakage
Binary star in the constellation Triangulum
is an eclipsing binary variable, first identified by the Northern Sky Variability Survey survey in 2004 and given its variable-star designation BX Trianguli
BX_Trianguli
Fluctuations in stellar radius
regular light curves. This regular behavior is in contrast with the variability of stars that lie parallel to and to the high-luminosity/low-temperature
Stellar_pulsation
Scientific study of climate
period of time. The main topics of research are the study of climate variability, mechanisms of climate changes and modern climate change. This topic
Climatology
American scientist and researcher
research, where he used deterministic theory to understand the cyclic variability in spark ignition engines. He worked with Ford Motor Company and Oak
Johney_Green
New Zealand management professor
she was a student of Hans Daellenbach. She then completed a PhD titled Variability in distribution at the Department of Operational Research at the University
Vicky_Mabin
Difference of a temperature from a reference value
temperatures than another of +3 °C from a region with normally large variability. For this purpose, anomalies are often shown as 'standardized anomalies'
Temperature_anomaly
Czech seismologist and geophysicist (1928–2021)
GEOSTAS, which deals with astrophysics, on a prediction prognosis of the variability of the times of the origins and manifestations of the magnitudes of the
Břetislav_Staš
Latter part of the menstrual cycle
approximately 14 days, recent research suggests that there can be wide variability in luteal phase lengths not just from person to person, but from cycle
Luteal_phase
Triple star system in the constellation Sagittarius
pattern. Photometric variability of the star was reported by Paul A. Crowther, in 1997. Large amplitude quasi-periodic variability was reported by Taichi
WR_104
runoff comes from areas of very low climatic variability, the total global runoff is generally of low variability. Indeed, even in most arid zones, there tends
Water_distribution_on_Earth
Drive to eat for pleasure rather than sustenance
increased hedonic hunger susceptibility to environmental food cues. Genetic variability may influence hedonic hyperphagia. Variation in hedonic hunger levels
Hedonic_hunger
Class of renewable energy sources
Characteristics of variable renewables include their unpredictability, variability, and low operating costs. These, along with renewables typically being
Variable_renewable_energy
Personality disorder
adolescence and early adulthood. The prognosis for ASPD is complex, with high variability in outcomes. Individuals with severe ASPD symptoms may have difficulty
Antisocial personality disorder
Antisocial_personality_disorder
Star in the constellation Ophiuchus
magnitude range for the two stars combined of 4.00 to 4.03. The type of variability is uncertain and it is not clear which of the two components causes the
70_Ophiuchi
Active galactic nucleus in the constellation Libra
emission in the TeV range. Fan, J. H.; Lin, R. G. (July 2000). "Optical Variability and Periodicity Analysis for Blazars. I. Light Curves for Radio-selected
AP_Librae
Measurement of the human penis
length and circumference when flaccid and erect. Besides the natural variability of human penises in general, there are factors that lead to minor variations
Human_penis_size
Extrasolar free-floating planet
being older than previously thought. It has a mass of 8.3 ± 0.5 MJ. Variability was first detected with the New Technology Telescope, showing a rotation
PSO_J318.5−22
Discipline within engineering design
primarily with the consideration and minimization of the effects of random variability upon the performance of an engineering system during the design phase
Probabilistic_design
Field of scientific study
between solar variability and climate. Arctic paleoclimate, in particular, has linked total solar irradiance variations and climate variability. A 2001 paper
Solar_activity_and_climate
Warm weather period, 250 BC to AD 400
Dendrochronological evidence from wood found at the Parthenon shows variability of climate in the 5th century BC, which resembles the modern pattern
Roman_Warm_Period
Sedimentary basin of the Congo River in Central Africa
the hydrology of the basin more variable. A 2012 study finds that the variability in precipitation caused by climate change will negatively affect economic
Congo_Basin
Brown dwarf or planet colder than 500 Kelvin
1405+5534 (Y0) and its variability is modelled with a single bright spot. Another variable Y dwarf is WISE 1738+2732 (Y0) and its variability is explained with
Y_dwarf
Large self-illuminated object in space
properties—including mass, age, metallicity (chemical composition), variability, distance, and motion through space—by carrying out observations of a
Star
provides an architecture that is based on commonality as well as planned variabilities. The various product variants can be derived from the basic product
Product-family_engineering
Form of distribution marketing
to suppliers tend to have a larger variability than sales to buyers, which results in an amplified demand variability upstream. In part, this results in
Bullwhip_effect
Binary star in the constellation Taurus
(2025-10-21), "On the influence of component orbital motion on the photometric variability of DF Tau", Astrophysical Bulletin, arXiv:2510.18495. Kutra, Taylor;
DF_Tauri
Term in evolutionary biology and behavioural ecology
There are multiple proposed explanations for the behaviour, but its variability and broad taxonomic occurrences result in simultaneously plausible theories
Helpers_at_the_nest
Quasar in the Hercules constellation
constellation of Hercules. It is noted for hosting a superluminal jet and its variability in almost all wave bands. 3C 345 has an active galactic nucleus that
3C_345
Measures of observational error
precision is a description of random errors (a measure of statistical variability), accuracy has two different definitions: More commonly, a description
Accuracy_and_precision
its long-term stability making them suitable for studied of cosmic-ray variability through decades. The most stable long-running neutron monitors are: Oulu
Neutron_monitor
German oceanographer and climate modeller
Cambridge. He is best known for developing the Hasselmann model of climate variability, where a system with a long memory (the ocean) integrates stochastic
Klaus_Hasselmann
Subdivision of pharmacology
development. A major focus of pharmacometrics is to understand variability in drug response. Variability may be predictable (e.g., due to differences in body weight
Pharmacometrics
Star in the constellation of Coma Berenices
prototype for the FK Comae Berenices (FK Com) class of variable stars. The variability of FK Com stars may be caused by large, cool spots on the rotating surfaces
FK_Comae_Berenices
Large feline of the genus Acinonyx
experienced two population bottlenecks that greatly decreased the genetic variability in populations; one occurred about 100,000 years ago that has been correlated
Cheetah
Personality disorder
partnerships, domestic abuse, and unintended pregnancies. Research indicates variability in relationship patterns among individuals with BPD. A portion of these
Borderline personality disorder
Borderline_personality_disorder
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