Degree of freedom for t-test

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• Student'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 …   Wikipedia

• Freedom of speech by country — Freedom of speech is the concept of the inherent human right to voice one s opinion publicly without fear of censorship or punishment. Speech is not limited to public speaking and is generally taken to include other forms of expression. The right …   Wikipedia

• Likelihood-ratio test — The likelihood ratio, often denoted by Lambda (the capital Greek letter lambda), is the ratio of the maximum probability of a result under two different hypotheses. A likelihood ratio test is a statistical test for making a decision between two… …   Wikipedia

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• degree — 1. One of the divisions on the scale of a measuring instrument such as a thermometer, barometer, etc. See Comparative Temperature Scales appendix. See scale. 2. The 360th part of the circumference of a circle. 3. A position or …   Medical dictionary

• Pearson's chi-squared test — (χ2) is the best known of several chi squared tests – statistical procedures whose results are evaluated by reference to the chi squared distribution. Its properties were first investigated by Karl Pearson in 1900.[1] In contexts where it is… …   Wikipedia

• Degrees of freedom (statistics) — In statistics, the number of degrees of freedom is the number of values in the final calculation of a statistic that are free to vary.[1] Estimates of statistical parameters can be based upon different amounts of information or data. The number… …   Wikipedia

• Pearson's chi-square test — Pearson s chi square ( chi;2) test is the best known of several chi square tests – statistical procedures whose results are evaluated by reference to the chi square distribution. Its properties were first investigated by Karl Pearson. In contexts …   Wikipedia

• Transmission disequilibrium test — The transmission disequilibrium test (TDT) was proposed by [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve db=pubmed dopt=Abstract list uids=8447318 Spielman, McGinnis Ewens (1993)] as a family based association test for the presence… …   Wikipedia

• Academic freedom — is the belief that the freedom of inquiry by students and faculty members is essential to the mission of the academy. They argue that academic communities are repeatedly targeted for repression due to their ability to shape and control the flow… …   Wikipedia