TD_ZTest Output - Teradata Vantage

Teradata® VantageCloud Lake
Deployment
VantageCloud
Edition
Lake
Product
Teradata Vantage
Published
January 2023
Language
English (United States)
Last Update
2024-04-03
dita:mapPath
phg1621910019905.ditamap
dita:ditavalPath
pny1626732985837.ditaval
dita:id
phg1621910019905

Output Table Schema

Column Data Type Description
sample_column_1 VARCHAR Data for first sample population.
sample_column_2 VARCHAR [Column appears only if you specify SecondSampleColumn.]

Data for second sample population.
N1 INTEGER Size of first sample.
N2 INTEGER [Column appears only if you specify SecondSampleColumn.]

Size of second sample.
mean1 DOUBLE PRECISION Mean of first sample.
mean2 DOUBLE PRECISION [Column appears only if you specify SecondSampleColumn.]

Mean of second sample.
AlternativeHypothesis VARCHAR Hypothesis accepted if null hypothesis is rejected (H1).
z_score DOUBLE PRECISION Test statistic z score.
Alpha DOUBLE PRECISION Alpha value (see Required Syntax Elements for TD_ZTest).
CriticalValue DOUBLE PRECISION Critical value calculated using Alpha for test (z_α).
p_value DOUBLE PRECISION Probability associated with Z-test statistic:
  • One-tailed, lower-tailed test:

    This is the lower-tail probability under normal distribution.

  • One-tailed, upper-tailed test:

    This is the upper-tail probability under normal distribution.

  • Two-tailed test:

If p_value is less than alpha, reject null hypothesis.
Conclusion VARCHAR Z-test result, either 'reject null hypothesis' or 'fail to reject null hypothesis'.

If Conclusion is 'reject null hypothesis', rejection confidence level is 1-alpha.