chi-square
Goodness-of-fit measure
Chi-square is a statistical measure comparing observed frequencies to expected frequencies.
In a chi-square test, researchers determine whether differences between groups are statistically significant or likely due to chance: A chi-square test showed the relationship between smoking and lung cancer was not random.
The name comes from the Greek letter chi (χ), which represents the statistic in formulas.
Testable proposed explanation
- p-valueProbability under null hypothesis
- significanceQuality of mattering
- PearsonAnglo surname
- assumptionsUnproven things taken as true
Two-variable frequency matrix
- associationGroup with shared aim
- nominalIn designation only
- ordinalNumber denoting position
- relationshipConnection between entities
Ongoing compensation for rebroadcasts
Distribution asymmetry measure
- cumulativeIncreasing by successive additions
- percentileStatistical ranking threshold
- asymptoticApproaching a limit infinitely
- continuousWithout pause or gap
nonnegative · mean · variance · theoretical
Study of disease spread
- geneticsScience of hereditary transmission
- sociologyStudy of human communities
- psychologyStudy of mind, behavior
- pollingSystematic opinion gathering
hypothesis
Testable proposed explanation
- p-valueProbability under null hypothesis
- significanceQuality of mattering
- PearsonAnglo surname
cross-tabulation
Two-variable frequency matrix
- associationGroup with shared aim
- nominalIn designation only
- ordinalNumber denoting position
residuals
Ongoing compensation for rebroadcasts
skewness
Distribution asymmetry measure
- cumulativeIncreasing by successive additions
- percentileStatistical ranking threshold
- asymptoticApproaching a limit infinitely
continuous · nonnegative · mean · variance · theoretical
epidemiology
Study of disease spread
- geneticsScience of hereditary transmission
- sociologyStudy of human communities
- psychologyStudy of mind, behavior
- statisticsmean, median, mode, variance, standard deviation
- biostatisticsANOVA, biostatistics, t-tests, confidence interval, p-value
- Probability Distributionsnormal distribution, PDF, normal curve, t-distribution, frequency distribution
- corpus linguisticscorpus, word counts, word frequency, concordance, n-grams
- distributionsnormal, uniform, binomial, exponential, bell curve
- probabilityprobability, chance, random, randomness, odds