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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/unesp/360673
Title: 
Student's t-Distribution
Author(s): 
Boucher, Chris
Language: 
eng
Description: 
  • If Z is a standard normal random variable, Y is a chi-squared random variable with v degrees of freedom, and Z and Y are independent, then Z/(sqrt(Y/v))follows a t-distribution with v degrees of freedom. Subtracting from the mean of a random sample of size n from a normal population the population mean and dividing by the sample standard deviation yields a variable that follows a t-distribution with n-1 degrees of freedom. Because of this, percentiles of the t-distribution are useful in estimating the parameters of an unknown normal population. The mean of the t-distribution is zero, and the variance is twice the number of degrees of freedom. Student t-distributions are very close to the standard normal distribution, and become closer as the number of degrees of freedom increases. The overlap computed is the area of the region under both curves; note that the area under each curve is 1
  • Componente Curricular::Educação Superior::Ciências Exatas e da Terra::Matemática
Issue Date: 
  • 11-Sep-2008
  • 11-Sep-2008
  • 2008
  • 11-Sep-2008
  • 9-Sep-2008
Publisher: 
Wolfram
Keywords: 
  • Approximation Methods
  • Educação Superior::Ciências Exatas e da Terra::Matemática::Análise Complexa
Credits: 
This demonstration needs the "MathematicaPlayer.exe" to run. Found in http://objetoseducacionais2.mec.gov.br/handle/mec/4737
Source: 
http://objetoseducacionais2.mec.gov.br/handle/mec/5251
URI: 
http://acervodigital.unesp.br/handle/unesp/360673
Rights: 
Demonstration freeware using Mathematica Player
Type: 
outro
Appears in Collections:MEC - Objetos Educacionais (BIOE) - OE

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