t distribution
noun Date: circa 1957 a probability density function that is used especially in testing hypotheses concerning means of normal distributions whose standard deviations are unknown and that is the distribution of a random variable t = (un)/v where u and v are themselves independent random variables and u has a normal distribution with mean 0 and a standard deviation of 1 and v2 has a chi-square distribution with n degrees of freedom — called also student's t distribution

New Collegiate Dictionary. 2001.

Look at other dictionaries:

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  • t distribution. — See Student s t distribution. [1955 60] * * * …   Universalium

  • t distribution — /ˈti dɪstrəbjuʃən/ (say tee distruhbyoohshuhn) noun Statistics → Student s t distribution …   Australian English dictionary

  • Student's t-distribution — Probability distribution name =Student s t type =density pdf cdf parameters = u > 0 degrees of freedom (real) support =x in ( infty; +infty)! pdf =frac{Gamma(frac{ u+1}{2})} {sqrt{ upi},Gamma(frac{ u}{2})} left(1+frac{x^2}{ u} ight)^{ (frac{… …   Wikipedia

  • Noncentral t-distribution — Noncentral Student s t Probability density function parameters: degrees of freedom noncentrality parameter support …   Wikipedia

  • Student's t distribution — Statistics. a bell shaped probability distribution that is flatter or more stretched out than the normal distribution. Also, Student t distribution. Also called t distribution. [1925 30; after Student, pseudonym of William Sealy Gosset (1876… …   Universalium

  • Student's t distribution — noun A distribution that arises when the population standard deviation is unknown and has to be estimated from the data. Syn: Students t, t distribution See Also: Students t test …   Wiktionary

  • Student's t distribution — noun Statistics a continuous distribution which approximates the normal distribution for a small population. Also, t distribution. {from Student, pen name of WS Gosset, 1876–1937, British statistician} …   Australian English dictionary

  • student's t distribution — noun Usage: often capitalized S Etymology: Student, pen name of W. S. Gosset died 1937 British statistician Date: 1929 t distribution …   New Collegiate Dictionary

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