random variable
Probabilistic outcome function
A random variable is a quantity whose value depends on the outcome of a random process.
In probability and statistics, it assigns numerical values to possible outcomes: if you roll a die, the random variable might be the number showing.
Random variables can be discrete (countable outcomes like coin flips) or continuous (any value in a range, like heights or temperatures).
The expected value of a random variable is its long-run average.
Average, or spiteful
- varianceSpread around the mean
- standard deviationSpread around the mean
- expected valueProbability-weighted outcome average
- momentBrief period of time
skewness · covariance · correlation · median · mode · support · parameter · location
Twenty-fifth letter, uppercase
- ZAlphabet's closing character
- capital letterNon-lowercase form
- subscriptText below the line
- tildeWavy diacritical mark
realization · sample · outcome · domain · range · function · mapping · measurable
Individually separate, unconnected
- continuousWithout pause or gap
- independentFree from external control
- dependentRequiring outside support
- indicatorSign revealing status
Bernoulli · categorical · ordinal · nominal · latent · observable · endogenous · exogenous
Conforming to standard
- binomialExpression with two terms
- exponentialIncreasing by constant ratio
- uniformIdentical throughout
- betaGreek alphabet's second letter
gamma · chi-squared · log-normal · t-distribution · multivariate · discrete · continuous · joint
Imitation of real processes
- Monte CarloProbability estimation through randomness
- samplingExtracting subset for study
- estimationApproximate value judgment
- hypothesis testingStatistical method for evaluating claims
confidence interval · regression · signal processing · machine learning · econometrics · clinical trials · quality control · forecasting
mean
Average, or spiteful
- varianceSpread around the mean
- standard deviationSpread around the mean
- expected valueProbability-weighted outcome average
moment · skewness · covariance · correlation · median · mode · support · parameter · location · scale
Y
Twenty-fifth letter, uppercase
- ZAlphabet's closing character
- capital letterNon-lowercase form
- subscriptText below the line
tilde · realization · sample · outcome · domain · range · function · mapping · measurable · event
discrete
Individually separate, unconnected
- continuousWithout pause or gap
- independentFree from external control
- dependentRequiring outside support
indicator · Bernoulli · categorical · ordinal · nominal · latent · observable · endogenous · exogenous · stochastic
normal
Conforming to standard
- binomialExpression with two terms
- exponentialIncreasing by constant ratio
- uniformIdentical throughout
beta · gamma · chi-squared · log-normal · t-distribution · multivariate · discrete · continuous · joint · marginal
simulation
Imitation of real processes
- Monte CarloProbability estimation through randomness
- samplingExtracting subset for study
- estimationApproximate value judgment
hypothesis testing · confidence interval · regression · signal processing · machine learning · econometrics · clinical trials · quality control · forecasting
- stochastic processesmartingale, white noise, irreducibility, reversibility, transience
- probabilityprobability, chance, odds, luck, likely
- chancechance, luck, lottery, dice, probability
- randomizationRNG, shuffle, shuffling, seed, rand
- variablesunknown, x, y, placeholder, alpha
- Probability Distributionsnormal distribution, PDF, normal curve, t-distribution, frequency distribution
random variableconstant
Fixed, unvarying quantity
fixed point · known quantity · invariant · parameter · sure thing
random, variable, randomly, variability, randomness, variably, randomized, randomize, nonrandom