Values are for unloaded PU, means no pots, cables (guitar!!). You can see relation between resistance, frequency, phase angle, inductance and other interesting tech stuff. When you put pickup in to guitar resonant peak drops between 2kHz and 5kHz because of pot resistance and mainly cable capacitance. The muddier sound, the closest to 2kHz. According to various interpretation of these figures, these graphs show fat sound with lot of harmonics. Although this is all very valuable information, it is, by far, not enough to determine sound and performance of a pickup in your guitar. I remember one phrase from HI-FI which can be partly applied here: there is lie, bigger lie and technical data.