An example of probit analysis using the SAS system

Appendix 5.1 An example of probit analysis using the SAS system 

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From the printed output, several important parameters can be obtained as follows. 

Probit Procedure Iteration History for Parameter Estimates 

Iteration Ridge Loglikelihood Intercept LoglO (dose) 

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These ideas were first suggested by Bliss (1934) and were later extended by Finney (1964). Although the iterative procedure of probit analysis can be performed manually with a desk calculator (Finney, 1964), in recent years the method has been conveniently computerized (Finney, 1971 SAS Institute, 2002-2003). An example of probit analysis using the SAS system is illustrated in Appendix 5.1. 

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