Using FirstSampleName and SecondSampleVariance Arguments - Teradata Vantage

Teradata® VantageCloud Lake
Deployment
VantageCloud
Edition
Lake
Product
Teradata Vantage
Published
January 2023
ft:locale
en-US
ft:lastEdition
2024-12-11
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phg1621910019905.ditamap
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pny1626732985837.ditaval
dita:id
phg1621910019905

TD_FTest Input: insect2cols

groupName groupValue
--------- ----------
groupE    34
groupF    15
groupE    31
groupF    26
groupE    21
groupF    26
groupE    11
groupF    10
...       ...
groupD    12
groupB    21
groupD    12
groupB    19
groupD     5
groupB    21
...       ...
groupC    13
groupC    11
groupC    10
groupC    21
groupC    11
groupA    20
groupA    17
groupA    20
groupA    23
groupA    14
...       ...

TD_FTest SQL Call

SELECT * FROM TD_FTest(
  ON insect2cols AS InputTable
  USING
    SampleNameColumn('groupName')
    SampleValueColumn('groupValue')
    FirstSampleName('groupE')
    SecondSampleVariance(100.0)
    df2(25)
) AS dt;

TD_FTest Output

firstsamplevariance secondsamplevariance varianceratio df1 df2 CriticalValue Alpha p_value      Conclusion
------------------- -------------------- ------------- --- --- ------------- ----- -------      ----------
305.2888888889      100                  3.0528888889  9   25  2.6766418069  0.05  0.0263040598 Reject Null hypothesis