A data storage part (2) that stores a plurality of analysis results obtained by a plurality of analyses performed under a plurality of analysis conditions and a plurality of parameters included in the analysis conditions, wherein each analysis result is factor and each analysis condition is response, and the response and the factor are associated with each other, a data processor (4) configured to perform operation using data stored in the data storage part (2), and a display (8) electrically connected to the data processor (4) are included. The data processor (4) is configured to create a regression model indicating a relationship of a variable with the response, by determining coefficients of each of terms constituting a predetermined model expression, in which the factor is the variable, based on the model expression by using a predetermined statistical analysis algorithm, and the data processor (4) is configured to create reliability information, which is able to be referred by a user on the display (8), by quantifying reliability of the regression model based on a relationship with the response.