A non-transitory computer-readable recording medium stores therein a model generating program that causes a computer capable of accessing a memory device storing, among coefficients and input variables making up a model formula expressing an object to be modeled, statistical values associated with the coefficients to execute: inputting a data group as a combination of an input value and an output value with respect to the object; determining, based on a joint probability joining a first probability of occurrence of the model formula as defined by the statistical values and the coefficients and a second probability of occurrence of the model formula as defined by the input variables and output variables, values of the coefficients to maximize the joint probability by giving the data group to the input variables and the output variables of the joint probability; and outputting the values of the coefficients determined in relation to the model formula.