A scientific calculator has two 'log' buttons on it. These are marked log and ln. The log key is used for calculations of the form \({\log _{10}}x\). For example, to work out that \(\log 10000 = 4 ...

If you specify the OPTC option but not the C= option, PROC PROBIT's action depends on the response variable, as follows: If you specify either the LN or LOG10 option and some subjects have the first ...