3.3. Testing Hypotheses Correlation Analysis Correlation analysis was used to create a general and preliminary image of the relationship between research variables. According to the results of the analysis presented in Table 2, it is clear that there is a significant and negative correlation between the effect of information system and the quality of decision-making (−0.04, P < 0.05) and there is a significant and direct relationship between the effect of the support system and the quality of the decision (r = 0.145, **P < 0.1). 3.4. Regression Analysis Regression analysis was used to specify and determine the effect of information system on the rational decision-making process, and how much the use of support system affects the quality of the decision. As shown in Table 3, the effect of the information system on the use of the rational decision-making process is not reverse. In other words, the information system affects their desire to use the rational process indecision making. The Table 3 also shows that the rational decision-making process can significantly improve the quality of the decision, so this variable, rational decision-making process, has a direct effect on the quality of the decision.
