unequal variance
1Variance — In probability theory and statistics, the variance of a random variable, probability distribution, or sample is one measure of statistical dispersion, averaging the squared distance of its possible values from the expected value (mean). Whereas… …
2unequal — Synonyms and related words: assorted, asymmetric, at odds, at variance, broken, capricious, careening, catchy, changeable, changing, choppy, contrary, contrasted, contrasting, departing, desultory, deviating, deviative, deviatory, different,… …
3analysis of variance — noun a statistical method for making simultaneous comparisons between two or more means; a statistical method that yields values that can be tested to determine whether a significant relation exists between variables • Syn: ↑ANOVA • Topics:… …
4at variance — Synonyms and related words: against the grain, against the tide, against the wind, alienated, antagonistic, antiestablishment, antipathetic, assorted, at cross purposes, at daggers, at daggers drawn, at enmity, at feud, at issue, at loggerheads,… …
5Student's t-test — A t test is any statistical hypothesis test in which the test statistic follows a Student s t distribution if the null hypothesis is supported. It is most commonly applied when the test statistic would follow a normal distribution if the value of …
6Welch's t test — In statistics, Welch s t test is an adaptation of Student s t test intended for use with two samples having possibly unequal variances. As such, it is an approximate solution to the Behrens–Fisher problem.FormulasWelch s t test defines the… …
7Shayle R. Searle — Shayle Robert Searle Ph.D. (b. 1928) is Professor Emeritus of Biological Statistics at Cornell University. He is a leader in the field of linear and mixed models in statistics, and has published widely on the topics of linear models, mixed models …
8Tukey-Kramer method — The Tukey method (also known as Tukey s Honest Significance Test), named for John Tukey, is a single step multiple comparison procedure which applies simultaneously to the set of all pairwise comparisons:mu i mu jThe confidence coefficient for… …
9Huffman coding — Huffman tree generated from the exact frequencies of the text this is an example of a huffman tree . The frequencies and codes of each character are below. Encoding the sentence with this code requires 135 bits, as opposed of 288 bits if 36… …
10Gini coefficient — The Gini coefficient is a measure of statistical dispersion most prominently used as a measure of inequality of income distribution or inequality of wealth distribution. It is defined as a ratio with values between 0 and 1: A low Gini coefficient …
