In some pages online, it is mentioned that "whenever possible, the targeted noise frequencies should fall within the bead’s “resistive band,” meaning the range of frequencies in which the resistive impedance dominates the reactive impedance."
Does that mean that if I have noise that is between 50 MHz and 200 MHz, I would need my ferrite bead's X R Z plot to be resistive in this frequency band as shown in the image below, where the ferrite becomes more resistive than inductive for frequencies > 25 MHz?
Moreover, would higher resistance or lower resistance be better at filtering noise? Meaning, if one ferrite is 110 Ω @ 25 MHz while another one is 50 Ω @ 25 MHz, which would be better at suppressing noise?