Application Guide

192 Alphabetical Listing
tTest
Catalog >
tTest μ0,List[,Freq[,Hypoth]]
(Data list input)
tTest μ0,v,sx,n,[Hypoth]
(Summary stats input)
Performs a hypothesis test for a single
unknown population mean μ when the
population standard deviation σ is unknown.
A summary of results is stored in the
stat.results variable. (See page 177.)
Test H
0
: μ = μ0, against one of the
following:
For H
a
: μ < μ0, set Hypoth<0
For H
a
: μ ≠ μ0 (default), set Hypoth=0
For H
a
: μ > μ0, set Hypoth>0
For information on the effect of empty
elements in a list, see “Empty (Void)
Elements,” page 236.
Output variable Description
stat.t
(v − μ0) / (stdev / sqrt(n))
stat.PVal Smallest level of significance at which the null hypothesis can be rejected
stat.df Degrees of freedom
stat.v
Sample meanof the data sequence in List
stat.sx Sample standard deviation of the data sequence
stat.n Size of the sample
tTest_2Samp
Catalog >
tTest_2Samp List1,List2[,Freq1[,Freq2
[,Hypoth[,Pooled]]]]
(Data list input)
tTest_2Samp v1,sx1,n1,v2,sx2,n2[,Hypoth
[,Pooled]]
(Summary stats input)