1. A method for displaying oxygen saturation of a patient's blood comprising, using a processor configured to determine the oxygen saturation, wherein the processor is associated with a patient monitor, and wherein determining the oxygen saturation comprises: calculating using the processor an estimated value of the oxygen saturation of the patient's blood based at least in part upon information received from a sensor; displaying the estimated value on a display of the patient monitor; calculating, using the processor, at least one statistical parameter associated with the estimated value based at least in part upon information received from the sensor, wherein calculating the at least one statistical parameter comprises calculating an accuracy of the estimated value based at least in part upon one or more data characteristics of the information received from the sensor, wherein the one or more data characteristics comprise a pulse amplitude, a pulse shape, or a correlation of infrared and red components; and displaying the at least one statistical parameter with the estimated value on the display, wherein displaying the at least one statistical parameter comprises displaying the accuracy of the estimated value and at least one of an upper limit of a confidence interval and a lower limit of the confidence interval, wherein the displayed confidence interval limit is calculated based at least in part upon a predetermined confidence level or the information received from the sensor.