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172 Alphabetical Listing
zTest_2Samp
Catalog >
[,Freq2[,Hypoth]]]
(Data list input)
zTest_2Samp σ
1
,σ
2
,v1,n1,v2,n2[,Hypoth]
(Summary stats input)
Computes a two-sample z test. A summary
of results is stored in the stat.results
variable. (See page 145.)
Test H
0
: μ1 = μ2, against one of the
following:
For H
a
: μ1 < μ2, set Hypoth<0
For H
a
: μ1 ≠ μ2 (default), set Hypoth=0
For H
a
: μ1 > μ2, Hypoth>0
For information on the effect of empty
elements in a list, see “Empty (Void)
Elements,” page 196.
Output variable Description
stat.z Standard normal value computedfor the difference of means
stat.PVal Smallest level of significance at whichthe null hypothesis can be rejected
stat.x1, stat.x2
Sample means of the data sequences in List1 andList2
stat.sx1, stat.sx2
Sample standard deviations of the data sequences inList1 and List2
stat.n1, stat.n2 Size of the samples
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