Mathematica 9 is now available
SEARCH MATHEMATICA 8 DOCUMENTATION
THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT.
SEE THE DOCUMENTATION CENTER FOR THE LATEST INFORMATION.
Hypothesis Testing Package >
Hypothesis Testing Package SymbolTutorials »|See Also »|More About »

MeanDifferenceTest

MeanDifferenceTest[list1, list2, 0]
performs a test with null hypothesis 1-2=0.
  • MeanDifferenceTest[list1, list2, 0] gives a p-value for the test that the difference between the means 1 and 2 of the populations from which list1 and list2 were sampled is significantly different from 0.
  • MeanDifferenceTest is based on a normal distribution if the population variances are assumed known.
  • If the variances for the two populations are assumed equal and unknown, the test is based on Student's t distribution with Length[list1]+Length[list2]-2 degrees of freedom.
  • If the population variances are not assumed known and not assumed equal, Welch's approximation for the degrees of freedom is used.
  • The following options can be given:
EqualVariancesFalsewhether the unknown population variances are assumed equal
FullReportFalsewhether to include detailed information about a test
KnownVarianceNonevariance of population
SignificanceLevelNonesignificance level of the test
TwoSidedFalsewhether to perform a two-sided test
EXAMPLESCLOSE ALL
Basic Examples   (1)
Needs["HypothesisTesting`"]
A test of the difference of population means against 0:
In[2]:=
Click for copyable input
Out[2]=
© 2013 Wolfram Research, Inc. Japanese
Ask a question about this page  |  Suggest an improvement  |  Leave a message for the team