Patent ID: 7613697

Claim:
A data analyzing method comprising the steps of: storing in a memory unit to store m records Ri (i=1, 2, . . . , m and m is a natural number of 2 or more) having an explanatory variable xi and an object variable yi which is a quantitative variable; and reading in a computing unit to read out the m records Ri from the memory unit, to partition the m records Ri into n small sets Gj (j=1, 2, . . . , n and n is a natural number satisfying 2.ltoreq.n.ltoreq.m), to calculate an average value of the object variables yi for every small set Gj, to rearrange the n small sets Gj in an ascending order or a descending order of the average value, to calculate n−1 combinations Ak in which the n rearranged small sets Gj are partitioned into two large sets which are a large set G′ 1 k including the k small sets Gj (k=1, 2, . . . , n−1 and k is a natural number) selected in a descending order from the small set having the largest average value and a large set G′ 2 k including the number n−k remaining small sets Gj, to calculate a grade of unity which is represented as the following expression for each of the n−1 combinations Ak, and to perform a predetermined data analyzing operation on the basis of the grade of unity: Grade of Unity=[[S 0 −(S 1 +S 2 )]/S 0 ].times.100, where S 0 is the sum of deviation squares of the object variables yi of the m records Ri, S 1 is the sum of deviation squares of the object variables yi of the records Ri belonging to the large set G′ 1 k , and S 2 is the sum of deviation squares of the object variables yi of the records Ri belonging to the large set G′ 2 k.