SLEEP STAGE ESTIMATING APPARATUS, BIOLOGICAL DATA ESTIMATING APPARATUS, SLEEP STAGE ESTIMATING METHOD, BIOLOGICAL DATA ESTIMATING METHOD, SLEEP STAGE ESTIMATING PROGRAM, AND BIOLOGICAL DATA ESTIMATING PROGRAM
The estimation of the sleep stage at a time point where data does not exist, is enabled. An acquiring unit configured to acquire biological data indicating a wave of a heartbeat； a parameter estimating unit configured to estimate a parameter by using the biological data, with respect to a mathematical expression defining a medium frequency component of the wave of the heartbeat by using the parameter； and a sleep stage estimating unit configured to estimate a sleep stage from a value of the medium frequency component at any time point, based on the mathematical expression to which the estimated parameter is applied, are included.
