TD_FTest Function Example | Teradata Vantage - TD_FTest Example: Specify Two Sample Variances - Teradata® Database

Input

With two sample variances instead of two sample columns, you do not need InputTable.

SQL Call

SELECT * FROM td_ftest (
USING
FirstSampleVariance (1385.61)
SecondSampleVariance (521.22)
DF1 (9)
DF2 (19)
) AS dt;

Output

    firstsamplevariance    secondsamplevariance           varianceratio                   df1                   df2           CriticalValue                   Alpha                 p_value  Conclusion
----------------------  ----------------------  ----------------------  --------------------  --------------------  ----------------------  ----------------------  ----------------------  ----------------------------------------------------------------
 1.38561000000000E 003   5.21220000000000E 002   2.65839760561759E 000                     9                    19   2.88005204672380E 000   5.00000000000000E-002   6.96764431913391E-002  Fail to reject Null hypothesis