Cause analyzing apparatus, cause analysis method, and storage medium

A cause analysis method comprising:

• acquiring a reference data group including an objective variable and an explanatory variable, and target data including an objective variable and an explanatory variable;
• calculating an outlier score indicating a degree of deviation of the explanatory variable of the target data from a first distribution relating to the explanatory variable of the reference data group;
• calculating a relationship weight representing strength of a relationship between the objective variable and the explanatory variable of the reference data group;
• calculating a property weight representing a degree of match between values of the objective variable and the explanatory variable of the target data, and a second distribution relating to the objective variable and the explanatory variable of the reference data group;
• and
• calculating a cause score of the explanatory variable for a change in the objective variable of the target data based on the outlier score, the relationship weight, and the property weight.

A non-transitory computer readable storage medium including computer executable instructions, wherein the instructions, when executed by a processor, cause the processor to perform a method comprising:

• acquiring a reference data group including an objective variable and an explanatory variable, and target data including an objective variable and an explanatory variable;
• calculating an outlier score indicating a degree of deviation of the explanatory variable of the target data from a first distribution relating to the explanatory variable of the reference data group;
• calculating a relationship weight representing strength of a relationship between the objective variable and the explanatory variable of the reference data group;
• calculating a property weight representing a degree of match between values of the objective variable and the explanatory variable of the target data, and a second distribution relating to the objective variable and the explanatory variable of the reference data group;
• and
• calculating a cause score of the explanatory variable for a change in the objective variable of the target data based on the outlier score, the relationship weight, and the property weight.