t-test
Compares two averages
A t-test is a statistical method for determining whether two groups differ significantly from each other.
It compares the means of two samples while accounting for variation within each group.
The test produces a t-value that, combined with sample size, indicates whether observed differences likely reflect real effects or random chance: A t-test showed the treatment group performed significantly better than the control.
Testable proposed explanation
- significanceQuality of mattering
- p-valueProbability under null hypothesis
- null hypothesisAssumed no relationship exists
- confidence intervalEstimated bounds for population parameter
alpha · rejection · statistical significance · power · degrees of freedom · parametric · assumptions · normality
Statistic's expected deviation measure
- sample sizeQuantity of observations taken
- standard deviationSpread around the mean
- formulaFixed method or notation
- numeratorNumber being divided
Method or resources
- differenceWay things contrast
- groupsCollections of related things
- control groupUntreated subjects for comparison
- treatment groupParticipants receiving the intervention
Controlled health research experiments
- psychologyStudy of mind, behavior
- medical researchScientific study of health
- laboratory experimentsControlled scientific investigations indoors
- quality controlMaintaining production standards
hypothesis
Testable proposed explanation
- significanceQuality of mattering
- p-valueProbability under null hypothesis
- null hypothesisAssumed no relationship exists
confidence interval · alpha · rejection · statistical significance · power · degrees of freedom · parametric · assumptions · normality
standard error
Statistic's expected deviation measure
- sample sizeQuantity of observations taken
- standard deviationSpread around the mean
- formulaFixed method or notation
means
Method or resources
- differenceWay things contrast
- groupsCollections of related things
- control groupUntreated subjects for comparison
clinical trials
Controlled health research experiments
- psychologyStudy of mind, behavior
- medical researchScientific study of health
- laboratory experimentsControlled scientific investigations indoors
- experimentsexperiment, experiments, test, tests, trials
- research methodsexperiment, hypothesis, deduction, experiments, induction
- statisticsmean, median, mode, variance, standard deviation
- data analysisstatistics, analysis, analytics, conclusions, mean
- metricsKPI, metric, KPIs, metrics, statistics
- biostatisticsANOVA, biostatistics, confidence interval, p-value, correlation