The license is generated based on a number for the named option and a file maps these features back to the name of the option. The option codes are specific to the option name and the Pro/ENGINEER config id, and can be found listed on the Pro/ENGINEER License Pack.
A test statistic is a standardized value that is calculated from sample data during a hypothesis test. You can use test statistics to determine whether to reject the null hypothesis. The test statistic compares your data with what is expected under the null hypothesis.
This statistic is based the sampling distribution for our sample statistic. The critical test statistic is what we would expect if the null hypothesis was correct. To find the correct critical test statistic in a probability table we need to know the sample size and the level of error we are willing to accept. We use the sample size to determine the degrees of freedom (df).