The SEQTEST Procedure
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Overview
- Getting Started
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Syntax
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DetailsInput Data SetsBoundary VariablesInformation Level Adjustments at Future StagesBoundary Adjustments for Information LevelsBoundary Adjustments for Minimum Error SpendingBoundary Adjustments for Overlapping Lower and Upper beta BoundariesStochastic CurtailmentRepeated Confidence IntervalsAnalysis after a Sequential TestAvailable Sample Space Orderings in a Sequential TestApplicable Tests and Sample Size ComputationTable OutputODS Table NamesGraphics OutputODS Graphics
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ExamplesTesting the Difference between Two ProportionsTesting an Effect in a Regression ModelTesting an Effect with Early Stopping to Accept H0Testing a Binomial ProportionComparing Two Proportions with a Log Odds Ratio TestComparing Two Survival Distributions with a Log-Rank TestTesting an Effect in a Proportional Hazards Regression ModelTesting an Effect in a Logistic Regression ModelConducting a Trial with a Nonbinding Acceptance Boundary
- References
ODS Graphics
Statistical procedures use ODS Graphics to create graphs as part of their output. ODS Graphics is described in detail in Chapter 21: Statistical Graphics Using ODS.
Before you create graphs, ODS Graphics must be enabled (for example, by specifying the ODS GRAPHICS ON statement). For more information about enabling and disabling ODS Graphics, see the section Enabling and Disabling ODS Graphics in Chapter 21: Statistical Graphics Using ODS.
The overall appearance of graphs is controlled by ODS styles. Styles and other aspects of using ODS Graphics are discussed in the section A Primer on ODS Statistical Graphics in Chapter 21: Statistical Graphics Using ODS.
PROC SEQTEST assigns a name to each graph it creates. You can use these names to reference the graphs when using ODS. To request these graphs, ODS Graphics must be enabled and you must specify the options indicated in Table 84.4.
Table 84.4: Graphs Produced by PROC SEQTEST
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ODS Graph Name |
Plot Description |
Option |
|---|---|---|
|
AsnPlot |
Average sample numbers |
PLOTS=ASN |
|
CondPowerPlot |
Conditional power curves |
PLOTS=CONDPOWER |
|
ErrSpendPlot |
Error spending |
PLOTS=ERRSPEND |
|
PowerPlot |
Power curves |
PLOTS=POWER |
|
RepeatedCIPlot |
Repeated confidence intervals |
PLOTS=RCI |
|
TestPlot |
Boundary values and test statistics |
PLOTS=TEST |