(Parametric Statistics) is a statistical method which must be based on a preliminary agreement, as follows:
1. information must be in the range level.
2. information derived from the sample must have a normal distribution curve with
3. Each group of populations that Panama has the same variation studies.
Statistics of this type, such as t-test, Z-test, ANOVA, Regression etc.
2.2 the statistics without parameters (Nonparametric Statistics) is a statistical method that can be used without preliminary agreement. The statistics are in this category, such as CAI, Median test, Sign test, etc.
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